Home / 100,200.96-138,302.28-57,785.04

Finding the Fourth Proportional to 100,200.96, 138,302.28 and 57,785.04

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Solution

The fourth proportional to 100,200.96, 138,302.28 and 57,785.04 is: 79,757.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,200.96 : 138,302.28 = 57,785.04 : x
  2. Step 2: Convert to fraction form
    100,200.96/138,302.28 = 57,785.04/x
  3. Step 3: Cross multiply
    100,200.96x = 138,302.28 × 57,785.04
  4. Step 4: Simplify right side
    100,200.96x = 7,991,802,781.89
  5. Step 5: Solve for x
    x = 7,991,802,781.89/100,200.96
  6. Step 6: Final answer
    x = 79,757.75

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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.