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Finding the Fourth Proportional to 309,115.76, 426,585.16 and 173,148.56

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Solution

The fourth proportional to 309,115.76, 426,585.16 and 173,148.56 is: 238,948.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,115.76 : 426,585.16 = 173,148.56 : x
  2. Step 2: Convert to fraction form
    309,115.76/426,585.16 = 173,148.56/x
  3. Step 3: Cross multiply
    309,115.76x = 426,585.16 × 173,148.56
  4. Step 4: Simplify right side
    309,115.76x = 73,862,606,171.37
  5. Step 5: Solve for x
    x = 73,862,606,171.37/309,115.76
  6. Step 6: Final answer
    x = 238,948.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.