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Finding the Fourth Proportional to 66,432.96, 91,708.20 and 40,943.88

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Solution

The fourth proportional to 66,432.96, 91,708.20 and 40,943.88 is: 56,521.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,432.96 : 91,708.20 = 40,943.88 : x
  2. Step 2: Convert to fraction form
    66,432.96/91,708.20 = 40,943.88/x
  3. Step 3: Cross multiply
    66,432.96x = 91,708.20 × 40,943.88
  4. Step 4: Simplify right side
    66,432.96x = 3,754,889,535.82
  5. Step 5: Solve for x
    x = 3,754,889,535.82/66,432.96
  6. Step 6: Final answer
    x = 56,521.48

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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.