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Finding the Fourth Proportional to 66,545.80, 99,818.70 and 60,422.20

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Solution

The fourth proportional to 66,545.80, 99,818.70 and 60,422.20 is: 90,633.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,545.80 : 99,818.70 = 60,422.20 : x
  2. Step 2: Convert to fraction form
    66,545.80/99,818.70 = 60,422.20/x
  3. Step 3: Cross multiply
    66,545.80x = 99,818.70 × 60,422.20
  4. Step 4: Simplify right side
    66,545.80x = 6,031,265,455.14
  5. Step 5: Solve for x
    x = 6,031,265,455.14/66,545.80
  6. Step 6: Final answer
    x = 90,633.30

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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.