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Finding the Fourth Proportional to 96,729.60, 144,940.80 and 81,062.40

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Solution

The fourth proportional to 96,729.60, 144,940.80 and 81,062.40 is: 121,464.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,729.60 : 144,940.80 = 81,062.40 : x
  2. Step 2: Convert to fraction form
    96,729.60/144,940.80 = 81,062.40/x
  3. Step 3: Cross multiply
    96,729.60x = 144,940.80 × 81,062.40
  4. Step 4: Simplify right side
    96,729.60x = 11,749,249,105.92
  5. Step 5: Solve for x
    x = 11,749,249,105.92/96,729.60
  6. Step 6: Final answer
    x = 121,464.88

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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.