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Finding the Fourth Proportional to 162,139.80, 243,209.70 and 112,276.20

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Solution

The fourth proportional to 162,139.80, 243,209.70 and 112,276.20 is: 168,414.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,139.80 : 243,209.70 = 112,276.20 : x
  2. Step 2: Convert to fraction form
    162,139.80/243,209.70 = 112,276.20/x
  3. Step 3: Cross multiply
    162,139.80x = 243,209.70 × 112,276.20
  4. Step 4: Simplify right side
    162,139.80x = 27,306,660,919.14
  5. Step 5: Solve for x
    x = 27,306,660,919.14/162,139.80
  6. Step 6: Final answer
    x = 168,414.30

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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.