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Finding the Fourth Proportional to 66,281.27, 99,421.90 and 54,569.88

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Solution

The fourth proportional to 66,281.27, 99,421.90 and 54,569.88 is: 81,854.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,281.27 : 99,421.90 = 54,569.88 : x
  2. Step 2: Convert to fraction form
    66,281.27/99,421.90 = 54,569.88/x
  3. Step 3: Cross multiply
    66,281.27x = 99,421.90 × 54,569.88
  4. Step 4: Simplify right side
    66,281.27x = 5,425,441,015.95
  5. Step 5: Solve for x
    x = 5,425,441,015.95/66,281.27
  6. Step 6: Final answer
    x = 81,854.82

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1.5x scale

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.