Home / 81,145.28-121,646.88-39,004.32

Finding the Fourth Proportional to 81,145.28, 121,646.88 and 39,004.32

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Solution

The fourth proportional to 81,145.28, 121,646.88 and 39,004.32 is: 58,472.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,145.28 : 121,646.88 = 39,004.32 : x
  2. Step 2: Convert to fraction form
    81,145.28/121,646.88 = 39,004.32/x
  3. Step 3: Cross multiply
    81,145.28x = 121,646.88 × 39,004.32
  4. Step 4: Simplify right side
    81,145.28x = 4,744,753,834.52
  5. Step 5: Solve for x
    x = 4,744,753,834.52/81,145.28
  6. Step 6: Final answer
    x = 58,472.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.