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Finding the Fourth Proportional to 162,031.80, 243,047.70 and 138,412.20

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Solution

The fourth proportional to 162,031.80, 243,047.70 and 138,412.20 is: 207,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,031.80 : 243,047.70 = 138,412.20 : x
  2. Step 2: Convert to fraction form
    162,031.80/243,047.70 = 138,412.20/x
  3. Step 3: Cross multiply
    162,031.80x = 243,047.70 × 138,412.20
  4. Step 4: Simplify right side
    162,031.80x = 33,640,766,861.94
  5. Step 5: Solve for x
    x = 33,640,766,861.94/162,031.80
  6. Step 6: Final answer
    x = 207,618.30

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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.