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Finding the Fourth Proportional to 66,031.80, 98,901.90 and 42,412.20

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Solution

The fourth proportional to 66,031.80, 98,901.90 and 42,412.20 is: 63,524.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,031.80 : 98,901.90 = 42,412.20 : x
  2. Step 2: Convert to fraction form
    66,031.80/98,901.90 = 42,412.20/x
  3. Step 3: Cross multiply
    66,031.80x = 98,901.90 × 42,412.20
  4. Step 4: Simplify right side
    66,031.80x = 4,194,647,163.18
  5. Step 5: Solve for x
    x = 4,194,647,163.18/66,031.80
  6. Step 6: Final answer
    x = 63,524.65

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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.