Home / 138,612.52-191,284.33-78,183.65

Finding the Fourth Proportional to 138,612.52, 191,284.33 and 78,183.65

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Solution

The fourth proportional to 138,612.52, 191,284.33 and 78,183.65 is: 107,892.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,612.52 : 191,284.33 = 78,183.65 : x
  2. Step 2: Convert to fraction form
    138,612.52/191,284.33 = 78,183.65/x
  3. Step 3: Cross multiply
    138,612.52x = 191,284.33 × 78,183.65
  4. Step 4: Simplify right side
    138,612.52x = 14,955,307,107.20
  5. Step 5: Solve for x
    x = 14,955,307,107.20/138,612.52
  6. Step 6: Final answer
    x = 107,892.90

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1.5x scale

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.