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Finding the Fourth Proportional to 66,201.20, 99,301.80 and 42,581.60

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Solution

The fourth proportional to 66,201.20, 99,301.80 and 42,581.60 is: 63,872.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,201.20 : 99,301.80 = 42,581.60 : x
  2. Step 2: Convert to fraction form
    66,201.20/99,301.80 = 42,581.60/x
  3. Step 3: Cross multiply
    66,201.20x = 99,301.80 × 42,581.60
  4. Step 4: Simplify right side
    66,201.20x = 4,228,429,526.88
  5. Step 5: Solve for x
    x = 4,228,429,526.88/66,201.20
  6. Step 6: Final answer
    x = 63,872.40

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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.