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Finding the Fourth Proportional to 259,882.66, 389,979.51 and 112,138.66

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Solution

The fourth proportional to 259,882.66, 389,979.51 and 112,138.66 is: 168,275.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,882.66 : 389,979.51 = 112,138.66 : x
  2. Step 2: Convert to fraction form
    259,882.66/389,979.51 = 112,138.66/x
  3. Step 3: Cross multiply
    259,882.66x = 389,979.51 × 112,138.66
  4. Step 4: Simplify right side
    259,882.66x = 43,731,779,678.86
  5. Step 5: Solve for x
    x = 43,731,779,678.86/259,882.66
  6. Step 6: Final answer
    x = 168,275.10

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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.