Home / 100,221.29-138,317.02-57,781.34

Finding the Fourth Proportional to 100,221.29, 138,317.02 and 57,781.34

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Solution

The fourth proportional to 100,221.29, 138,317.02 and 57,781.34 is: 79,744.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,221.29 : 138,317.02 = 57,781.34 : x
  2. Step 2: Convert to fraction form
    100,221.29/138,317.02 = 57,781.34/x
  3. Step 3: Cross multiply
    100,221.29x = 138,317.02 × 57,781.34
  4. Step 4: Simplify right side
    100,221.29x = 7,992,142,760.41
  5. Step 5: Solve for x
    x = 7,992,142,760.41/100,221.29
  6. Step 6: Final answer
    x = 79,744.96

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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.