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Finding the Fourth Proportional to 72,654.40, 108,981.60 and 72,654.40

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Solution

The fourth proportional to 72,654.40, 108,981.60 and 72,654.40 is: 108,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,654.40 : 108,981.60 = 72,654.40 : x
  2. Step 2: Convert to fraction form
    72,654.40/108,981.60 = 72,654.40/x
  3. Step 3: Cross multiply
    72,654.40x = 108,981.60 × 72,654.40
  4. Step 4: Simplify right side
    72,654.40x = 7,917,992,759.04
  5. Step 5: Solve for x
    x = 7,917,992,759.04/72,654.40
  6. Step 6: Final answer
    x = 108,981.60

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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.