Home / 345,939.80-518,861.10-109,306.40

Finding the Fourth Proportional to 345,939.80, 518,861.10 and 109,306.40

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Solution

The fourth proportional to 345,939.80, 518,861.10 and 109,306.40 is: 163,944.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,939.80 : 518,861.10 = 109,306.40 : x
  2. Step 2: Convert to fraction form
    345,939.80/518,861.10 = 109,306.40/x
  3. Step 3: Cross multiply
    345,939.80x = 518,861.10 × 109,306.40
  4. Step 4: Simplify right side
    345,939.80x = 56,714,838,941.04
  5. Step 5: Solve for x
    x = 56,714,838,941.04/345,939.80
  6. Step 6: Final answer
    x = 163,944.24

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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.