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Finding the Fourth Proportional to 66,405.80, 99,608.70 and 24,285.80

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Solution

The fourth proportional to 66,405.80, 99,608.70 and 24,285.80 is: 36,428.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,405.80 : 99,608.70 = 24,285.80 : x
  2. Step 2: Convert to fraction form
    66,405.80/99,608.70 = 24,285.80/x
  3. Step 3: Cross multiply
    66,405.80x = 99,608.70 × 24,285.80
  4. Step 4: Simplify right side
    66,405.80x = 2,419,076,966.46
  5. Step 5: Solve for x
    x = 2,419,076,966.46/66,405.80
  6. Step 6: Final answer
    x = 36,428.70

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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.