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Finding the Fourth Proportional to 65,560.64, 90,472.19 and 40,066.92

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Solution

The fourth proportional to 65,560.64, 90,472.19 and 40,066.92 is: 55,291.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,560.64 : 90,472.19 = 40,066.92 : x
  2. Step 2: Convert to fraction form
    65,560.64/90,472.19 = 40,066.92/x
  3. Step 3: Cross multiply
    65,560.64x = 90,472.19 × 40,066.92
  4. Step 4: Simplify right side
    65,560.64x = 3,624,941,798.62
  5. Step 5: Solve for x
    x = 3,624,941,798.62/65,560.64
  6. Step 6: Final answer
    x = 55,291.44

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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.