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Finding the Fourth Proportional to 65,491.20, 98,251.20 and 30,422.40

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Solution

The fourth proportional to 65,491.20, 98,251.20 and 30,422.40 is: 45,640.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,491.20 : 98,251.20 = 30,422.40 : x
  2. Step 2: Convert to fraction form
    65,491.20/98,251.20 = 30,422.40/x
  3. Step 3: Cross multiply
    65,491.20x = 98,251.20 × 30,422.40
  4. Step 4: Simplify right side
    65,491.20x = 2,989,037,306.88
  5. Step 5: Solve for x
    x = 2,989,037,306.88/65,491.20
  6. Step 6: Final answer
    x = 45,640.29

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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.