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Finding the Fourth Proportional to 143,959.20, 215,841.60 and 73,780.80

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Solution

The fourth proportional to 143,959.20, 215,841.60 and 73,780.80 is: 110,621.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,959.20 : 215,841.60 = 73,780.80 : x
  2. Step 2: Convert to fraction form
    143,959.20/215,841.60 = 73,780.80/x
  3. Step 3: Cross multiply
    143,959.20x = 215,841.60 × 73,780.80
  4. Step 4: Simplify right side
    143,959.20x = 15,924,965,921.28
  5. Step 5: Solve for x
    x = 15,924,965,921.28/143,959.20
  6. Step 6: Final answer
    x = 110,621.38

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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.