Home / 100,085.40-138,098.67-57,064.08

Finding the Fourth Proportional to 100,085.40, 138,098.67 and 57,064.08

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Solution

The fourth proportional to 100,085.40, 138,098.67 and 57,064.08 is: 78,737.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,085.40 : 138,098.67 = 57,064.08 : x
  2. Step 2: Convert to fraction form
    100,085.40/138,098.67 = 57,064.08/x
  3. Step 3: Cross multiply
    100,085.40x = 138,098.67 × 57,064.08
  4. Step 4: Simplify right side
    100,085.40x = 7,880,473,552.77
  5. Step 5: Solve for x
    x = 7,880,473,552.77/100,085.40
  6. Step 6: Final answer
    x = 78,737.49

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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.