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Finding the Fourth Proportional to 80,990.70, 111,767.00 and 45,178.58

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Solution

The fourth proportional to 80,990.70, 111,767.00 and 45,178.58 is: 62,346.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,990.70 : 111,767.00 = 45,178.58 : x
  2. Step 2: Convert to fraction form
    80,990.70/111,767.00 = 45,178.58/x
  3. Step 3: Cross multiply
    80,990.70x = 111,767.00 × 45,178.58
  4. Step 4: Simplify right side
    80,990.70x = 5,049,473,566.13
  5. Step 5: Solve for x
    x = 5,049,473,566.13/80,990.70
  6. Step 6: Final answer
    x = 62,346.34

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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.