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Finding the Fourth Proportional to 345,158.76, 517,888.92 and 120,680.40

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Solution

The fourth proportional to 345,158.76, 517,888.92 and 120,680.40 is: 181,073.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,158.76 : 517,888.92 = 120,680.40 : x
  2. Step 2: Convert to fraction form
    345,158.76/517,888.92 = 120,680.40/x
  3. Step 3: Cross multiply
    345,158.76x = 517,888.92 × 120,680.40
  4. Step 4: Simplify right side
    345,158.76x = 62,499,042,021.17
  5. Step 5: Solve for x
    x = 62,499,042,021.17/345,158.76
  6. Step 6: Final answer
    x = 181,073.32

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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.