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Finding the Fourth Proportional to 66,489.80, 99,540.30 and 64,545.80

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Solution

The fourth proportional to 66,489.80, 99,540.30 and 64,545.80 is: 96,629.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,489.80 : 99,540.30 = 64,545.80 : x
  2. Step 2: Convert to fraction form
    66,489.80/99,540.30 = 64,545.80/x
  3. Step 3: Cross multiply
    66,489.80x = 99,540.30 × 64,545.80
  4. Step 4: Simplify right side
    66,489.80x = 6,424,908,295.74
  5. Step 5: Solve for x
    x = 6,424,908,295.74/66,489.80
  6. Step 6: Final answer
    x = 96,629.98

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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.