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Finding the Fourth Proportional to 345,115.80, 517,730.40 and 108,401.40

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Solution

The fourth proportional to 345,115.80, 517,730.40 and 108,401.40 is: 162,619.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,115.80 : 517,730.40 = 108,401.40 : x
  2. Step 2: Convert to fraction form
    345,115.80/517,730.40 = 108,401.40/x
  3. Step 3: Cross multiply
    345,115.80x = 517,730.40 × 108,401.40
  4. Step 4: Simplify right side
    345,115.80x = 56,122,700,182.56
  5. Step 5: Solve for x
    x = 56,122,700,182.56/345,115.80
  6. Step 6: Final answer
    x = 162,619.91

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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.