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Finding the Fourth Proportional to 98,979.60, 148,267.80 and 61,424.40

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Solution

The fourth proportional to 98,979.60, 148,267.80 and 61,424.40 is: 92,011.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,979.60 : 148,267.80 = 61,424.40 : x
  2. Step 2: Convert to fraction form
    98,979.60/148,267.80 = 61,424.40/x
  3. Step 3: Cross multiply
    98,979.60x = 148,267.80 × 61,424.40
  4. Step 4: Simplify right side
    98,979.60x = 9,107,260,654.32
  5. Step 5: Solve for x
    x = 9,107,260,654.32/98,979.60
  6. Step 6: Final answer
    x = 92,011.49

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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.