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Finding the Fourth Proportional to 115,689.60, 173,419.20 and 53,251.20

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Solution

The fourth proportional to 115,689.60, 173,419.20 and 53,251.20 is: 79,823.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,689.60 : 173,419.20 = 53,251.20 : x
  2. Step 2: Convert to fraction form
    115,689.60/173,419.20 = 53,251.20/x
  3. Step 3: Cross multiply
    115,689.60x = 173,419.20 × 53,251.20
  4. Step 4: Simplify right side
    115,689.60x = 9,234,780,503.04
  5. Step 5: Solve for x
    x = 9,234,780,503.04/115,689.60
  6. Step 6: Final answer
    x = 79,823.77

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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.