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Finding the Fourth Proportional to 78,052.97, 117,079.46 and 18,888.65

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Solution

The fourth proportional to 78,052.97, 117,079.46 and 18,888.65 is: 28,332.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,052.97 : 117,079.46 = 18,888.65 : x
  2. Step 2: Convert to fraction form
    78,052.97/117,079.46 = 18,888.65/x
  3. Step 3: Cross multiply
    78,052.97x = 117,079.46 × 18,888.65
  4. Step 4: Simplify right side
    78,052.97x = 2,211,472,262.29
  5. Step 5: Solve for x
    x = 2,211,472,262.29/78,052.97
  6. Step 6: Final answer
    x = 28,332.97

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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.