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Finding the Fourth Proportional to 272,581.62, 408,956.13 and 139,555.26

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Solution

The fourth proportional to 272,581.62, 408,956.13 and 139,555.26 is: 209,375.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,581.62 : 408,956.13 = 139,555.26 : x
  2. Step 2: Convert to fraction form
    272,581.62/408,956.13 = 139,555.26/x
  3. Step 3: Cross multiply
    272,581.62x = 408,956.13 × 139,555.26
  4. Step 4: Simplify right side
    272,581.62x = 57,071,979,050.74
  5. Step 5: Solve for x
    x = 57,071,979,050.74/272,581.62
  6. Step 6: Final answer
    x = 209,375.74

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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.