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Finding the Fourth Proportional to 65,565.72, 90,454.80 and 40,371.48

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Solution

The fourth proportional to 65,565.72, 90,454.80 and 40,371.48 is: 55,696.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,565.72 : 90,454.80 = 40,371.48 : x
  2. Step 2: Convert to fraction form
    65,565.72/90,454.80 = 40,371.48/x
  3. Step 3: Cross multiply
    65,565.72x = 90,454.80 × 40,371.48
  4. Step 4: Simplify right side
    65,565.72x = 3,651,794,149.10
  5. Step 5: Solve for x
    x = 3,651,794,149.10/65,565.72
  6. Step 6: Final answer
    x = 55,696.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.