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Finding the Fourth Proportional to 66,410.48, 99,661.92 and 28,951.28

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Solution

The fourth proportional to 66,410.48, 99,661.92 and 28,951.28 is: 43,447.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,410.48 : 99,661.92 = 28,951.28 : x
  2. Step 2: Convert to fraction form
    66,410.48/99,661.92 = 28,951.28/x
  3. Step 3: Cross multiply
    66,410.48x = 99,661.92 × 28,951.28
  4. Step 4: Simplify right side
    66,410.48x = 2,885,340,151.26
  5. Step 5: Solve for x
    x = 2,885,340,151.26/66,410.48
  6. Step 6: Final answer
    x = 43,447.06

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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.