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Finding the Fourth Proportional to 103,080.70, 154,621.05 and 71,587.90

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Solution

The fourth proportional to 103,080.70, 154,621.05 and 71,587.90 is: 107,381.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,080.70 : 154,621.05 = 71,587.90 : x
  2. Step 2: Convert to fraction form
    103,080.70/154,621.05 = 71,587.90/x
  3. Step 3: Cross multiply
    103,080.70x = 154,621.05 × 71,587.90
  4. Step 4: Simplify right side
    103,080.70x = 11,068,996,265.30
  5. Step 5: Solve for x
    x = 11,068,996,265.30/103,080.70
  6. Step 6: Final answer
    x = 107,381.85

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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.