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Finding the Fourth Proportional to 96,711.60, 144,911.88 and 81,159.60

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Solution

The fourth proportional to 96,711.60, 144,911.88 and 81,159.60 is: 121,608.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,711.60 : 144,911.88 = 81,159.60 : x
  2. Step 2: Convert to fraction form
    96,711.60/144,911.88 = 81,159.60/x
  3. Step 3: Cross multiply
    96,711.60x = 144,911.88 × 81,159.60
  4. Step 4: Simplify right side
    96,711.60x = 11,760,990,216.05
  5. Step 5: Solve for x
    x = 11,760,990,216.05/96,711.60
  6. Step 6: Final answer
    x = 121,608.89

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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.