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Finding the Fourth Proportional to 65,446.40, 98,169.60 and 42,003.20

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Solution

The fourth proportional to 65,446.40, 98,169.60 and 42,003.20 is: 63,004.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,446.40 : 98,169.60 = 42,003.20 : x
  2. Step 2: Convert to fraction form
    65,446.40/98,169.60 = 42,003.20/x
  3. Step 3: Cross multiply
    65,446.40x = 98,169.60 × 42,003.20
  4. Step 4: Simplify right side
    65,446.40x = 4,123,437,342.72
  5. Step 5: Solve for x
    x = 4,123,437,342.72/65,446.40
  6. Step 6: Final answer
    x = 63,004.80

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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.