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Finding the Fourth Proportional to 99,751.60, 149,497.80 and 72,017.20

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Solution

The fourth proportional to 99,751.60, 149,497.80 and 72,017.20 is: 107,932.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,751.60 : 149,497.80 = 72,017.20 : x
  2. Step 2: Convert to fraction form
    99,751.60/149,497.80 = 72,017.20/x
  3. Step 3: Cross multiply
    99,751.60x = 149,497.80 × 72,017.20
  4. Step 4: Simplify right side
    99,751.60x = 10,766,412,962.16
  5. Step 5: Solve for x
    x = 10,766,412,962.16/99,751.60
  6. Step 6: Final answer
    x = 107,932.23

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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.