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Finding the Fourth Proportional to 157,078.68, 216,768.64 and 89,073.86

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Solution

The fourth proportional to 157,078.68, 216,768.64 and 89,073.86 is: 122,921.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,078.68 : 216,768.64 = 89,073.86 : x
  2. Step 2: Convert to fraction form
    157,078.68/216,768.64 = 89,073.86/x
  3. Step 3: Cross multiply
    157,078.68x = 216,768.64 × 89,073.86
  4. Step 4: Simplify right side
    157,078.68x = 19,308,419,491.75
  5. Step 5: Solve for x
    x = 19,308,419,491.75/157,078.68
  6. Step 6: Final answer
    x = 122,921.96

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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.