Home / 66,521.20-99,781.80-54,711.40

Finding the Fourth Proportional to 66,521.20, 99,781.80 and 54,711.40

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Solution

The fourth proportional to 66,521.20, 99,781.80 and 54,711.40 is: 82,067.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,521.20 : 99,781.80 = 54,711.40 : x
  2. Step 2: Convert to fraction form
    66,521.20/99,781.80 = 54,711.40/x
  3. Step 3: Cross multiply
    66,521.20x = 99,781.80 × 54,711.40
  4. Step 4: Simplify right side
    66,521.20x = 5,459,201,972.52
  5. Step 5: Solve for x
    x = 5,459,201,972.52/66,521.20
  6. Step 6: Final answer
    x = 82,067.10

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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.