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Finding the Fourth Proportional to 156,715.75, 216,267.74 and 89,647.75

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Solution

The fourth proportional to 156,715.75, 216,267.74 and 89,647.75 is: 123,713.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,715.75 : 216,267.74 = 89,647.75 : x
  2. Step 2: Convert to fraction form
    156,715.75/216,267.74 = 89,647.75/x
  3. Step 3: Cross multiply
    156,715.75x = 216,267.74 × 89,647.75
  4. Step 4: Simplify right side
    156,715.75x = 19,387,916,288.59
  5. Step 5: Solve for x
    x = 19,387,916,288.59/156,715.75
  6. Step 6: Final answer
    x = 123,713.90

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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.