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Finding the Fourth Proportional to 66,034.80, 98,906.40 and 42,415.20

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Solution

The fourth proportional to 66,034.80, 98,906.40 and 42,415.20 is: 63,529.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,034.80 : 98,906.40 = 42,415.20 : x
  2. Step 2: Convert to fraction form
    66,034.80/98,906.40 = 42,415.20/x
  3. Step 3: Cross multiply
    66,034.80x = 98,906.40 × 42,415.20
  4. Step 4: Simplify right side
    66,034.80x = 4,195,134,737.28
  5. Step 5: Solve for x
    x = 4,195,134,737.28/66,034.80
  6. Step 6: Final answer
    x = 63,529.15

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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.