Home / 99,572.28-137,317.44-72,672.18

Finding the Fourth Proportional to 99,572.28, 137,317.44 and 72,672.18

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Solution

The fourth proportional to 99,572.28, 137,317.44 and 72,672.18 is: 100,220.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,572.28 : 137,317.44 = 72,672.18 : x
  2. Step 2: Convert to fraction form
    99,572.28/137,317.44 = 72,672.18/x
  3. Step 3: Cross multiply
    99,572.28x = 137,317.44 × 72,672.18
  4. Step 4: Simplify right side
    99,572.28x = 9,979,157,716.82
  5. Step 5: Solve for x
    x = 9,979,157,716.82/99,572.28
  6. Step 6: Final answer
    x = 100,220.24

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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.