Home / 99,720.60-137,617.50-57,287.64

Finding the Fourth Proportional to 99,720.60, 137,617.50 and 57,287.64

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Solution

The fourth proportional to 99,720.60, 137,617.50 and 57,287.64 is: 79,058.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,720.60 : 137,617.50 = 57,287.64 : x
  2. Step 2: Convert to fraction form
    99,720.60/137,617.50 = 57,287.64/x
  3. Step 3: Cross multiply
    99,720.60x = 137,617.50 × 57,287.64
  4. Step 4: Simplify right side
    99,720.60x = 7,883,781,797.70
  5. Step 5: Solve for x
    x = 7,883,781,797.70/99,720.60
  6. Step 6: Final answer
    x = 79,058.71

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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.