Home / 156,419.36-215,870.16-89,349.92

Finding the Fourth Proportional to 156,419.36, 215,870.16 and 89,349.92

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Solution

The fourth proportional to 156,419.36, 215,870.16 and 89,349.92 is: 123,309.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,419.36 : 215,870.16 = 89,349.92 : x
  2. Step 2: Convert to fraction form
    156,419.36/215,870.16 = 89,349.92/x
  3. Step 3: Cross multiply
    156,419.36x = 215,870.16 × 89,349.92
  4. Step 4: Simplify right side
    156,419.36x = 19,287,981,526.39
  5. Step 5: Solve for x
    x = 19,287,981,526.39/156,419.36
  6. Step 6: Final answer
    x = 123,309.43

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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.