Home / 100,384.25-138,534.13-55,064.14

Finding the Fourth Proportional to 100,384.25, 138,534.13 and 55,064.14

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Solution

The fourth proportional to 100,384.25, 138,534.13 and 55,064.14 is: 75,990.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,384.25 : 138,534.13 = 55,064.14 : x
  2. Step 2: Convert to fraction form
    100,384.25/138,534.13 = 55,064.14/x
  3. Step 3: Cross multiply
    100,384.25x = 138,534.13 × 55,064.14
  4. Step 4: Simplify right side
    100,384.25x = 7,628,262,451.59
  5. Step 5: Solve for x
    x = 7,628,262,451.59/100,384.25
  6. Step 6: Final answer
    x = 75,990.63

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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.