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Finding the Fourth Proportional to 99,300.80, 148,951.20 and 63,871.40

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Solution

The fourth proportional to 99,300.80, 148,951.20 and 63,871.40 is: 95,807.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,300.80 : 148,951.20 = 63,871.40 : x
  2. Step 2: Convert to fraction form
    99,300.80/148,951.20 = 63,871.40/x
  3. Step 3: Cross multiply
    99,300.80x = 148,951.20 × 63,871.40
  4. Step 4: Simplify right side
    99,300.80x = 9,513,721,675.68
  5. Step 5: Solve for x
    x = 9,513,721,675.68/99,300.80
  6. Step 6: Final answer
    x = 95,807.10

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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.