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Finding the Fourth Proportional to 98,979.60, 148,177.80 and 65,737.20

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Solution

The fourth proportional to 98,979.60, 148,177.80 and 65,737.20 is: 98,412.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,979.60 : 148,177.80 = 65,737.20 : x
  2. Step 2: Convert to fraction form
    98,979.60/148,177.80 = 65,737.20/x
  3. Step 3: Cross multiply
    98,979.60x = 148,177.80 × 65,737.20
  4. Step 4: Simplify right side
    98,979.60x = 9,740,793,674.16
  5. Step 5: Solve for x
    x = 9,740,793,674.16/98,979.60
  6. Step 6: Final answer
    x = 98,412.13

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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.