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Finding the Fourth Proportional to 113,651.12, 156,872.96 and 65,916.20

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Solution

The fourth proportional to 113,651.12, 156,872.96 and 65,916.20 is: 90,984.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,651.12 : 156,872.96 = 65,916.20 : x
  2. Step 2: Convert to fraction form
    113,651.12/156,872.96 = 65,916.20/x
  3. Step 3: Cross multiply
    113,651.12x = 156,872.96 × 65,916.20
  4. Step 4: Simplify right side
    113,651.12x = 10,340,468,292.01
  5. Step 5: Solve for x
    x = 10,340,468,292.01/113,651.12
  6. Step 6: Final answer
    x = 90,984.31

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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.