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Finding the Fourth Proportional to 65,432.70, 98,128.24 and 21,049.12

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Solution

The fourth proportional to 65,432.70, 98,128.24 and 21,049.12 is: 31,566.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,432.70 : 98,128.24 = 21,049.12 : x
  2. Step 2: Convert to fraction form
    65,432.70/98,128.24 = 21,049.12/x
  3. Step 3: Cross multiply
    65,432.70x = 98,128.24 × 21,049.12
  4. Step 4: Simplify right side
    65,432.70x = 2,065,513,099.15
  5. Step 5: Solve for x
    x = 2,065,513,099.15/65,432.70
  6. Step 6: Final answer
    x = 31,566.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.