Home / 100,128,431.51-138,170,658.15-56,065,329.80

Finding the Fourth Proportional to 100,128,431.51, 138,170,658.15 and 56,065,329.80

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Solution

The fourth proportional to 100,128,431.51, 138,170,658.15 and 56,065,329.80 is: 77,366,472.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,128,431.51 : 138,170,658.15 = 56,065,329.80 : x
  2. Step 2: Convert to fraction form
    100,128,431.51/138,170,658.15 = 56,065,329.80/x
  3. Step 3: Cross multiply
    100,128,431.51x = 138,170,658.15 × 56,065,329.80
  4. Step 4: Simplify right side
    100,128,431.51x = 7,746,583,517,171,955
  5. Step 5: Solve for x
    x = 7,746,583,517,171,955/100,128,431.51
  6. Step 6: Final answer
    x = 77,366,472.25

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.