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Finding the Fourth Proportional to 65,920.92, 90,966.48 and 40,765.56

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Solution

The fourth proportional to 65,920.92, 90,966.48 and 40,765.56 is: 56,253.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,920.92 : 90,966.48 = 40,765.56 : x
  2. Step 2: Convert to fraction form
    65,920.92/90,966.48 = 40,765.56/x
  3. Step 3: Cross multiply
    65,920.92x = 90,966.48 × 40,765.56
  4. Step 4: Simplify right side
    65,920.92x = 3,708,299,498.43
  5. Step 5: Solve for x
    x = 3,708,299,498.43/65,920.92
  6. Step 6: Final answer
    x = 56,253.76

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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.