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Finding the Fourth Proportional to 99,140.80, 148,808.40 and 49,277.20

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Solution

The fourth proportional to 99,140.80, 148,808.40 and 49,277.20 is: 73,964.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,140.80 : 148,808.40 = 49,277.20 : x
  2. Step 2: Convert to fraction form
    99,140.80/148,808.40 = 49,277.20/x
  3. Step 3: Cross multiply
    99,140.80x = 148,808.40 × 49,277.20
  4. Step 4: Simplify right side
    99,140.80x = 7,332,861,288.48
  5. Step 5: Solve for x
    x = 7,332,861,288.48/99,140.80
  6. Step 6: Final answer
    x = 73,964.11

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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.