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Finding the Fourth Proportional to 66,565.80, 99,654.30 and 64,621.80

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Solution

The fourth proportional to 66,565.80, 99,654.30 and 64,621.80 is: 96,743.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,565.80 : 99,654.30 = 64,621.80 : x
  2. Step 2: Convert to fraction form
    66,565.80/99,654.30 = 64,621.80/x
  3. Step 3: Cross multiply
    66,565.80x = 99,654.30 × 64,621.80
  4. Step 4: Simplify right side
    66,565.80x = 6,439,840,243.74
  5. Step 5: Solve for x
    x = 6,439,840,243.74/66,565.80
  6. Step 6: Final answer
    x = 96,743.98

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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.