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Finding the Fourth Proportional to 65,390.80, 90,224.94 and 41,508.76

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Solution

The fourth proportional to 65,390.80, 90,224.94 and 41,508.76 is: 57,272.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,390.80 : 90,224.94 = 41,508.76 : x
  2. Step 2: Convert to fraction form
    65,390.80/90,224.94 = 41,508.76/x
  3. Step 3: Cross multiply
    65,390.80x = 90,224.94 × 41,508.76
  4. Step 4: Simplify right side
    65,390.80x = 3,745,125,380.47
  5. Step 5: Solve for x
    x = 3,745,125,380.47/65,390.80
  6. Step 6: Final answer
    x = 57,272.97

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1.5x scale

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.