Home / 155,917.11-215,164.56-87,934.68

Finding the Fourth Proportional to 155,917.11, 215,164.56 and 87,934.68

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Solution

The fourth proportional to 155,917.11, 215,164.56 and 87,934.68 is: 121,349.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,917.11 : 215,164.56 = 87,934.68 : x
  2. Step 2: Convert to fraction form
    155,917.11/215,164.56 = 87,934.68/x
  3. Step 3: Cross multiply
    155,917.11x = 215,164.56 × 87,934.68
  4. Step 4: Simplify right side
    155,917.11x = 18,920,426,730.94
  5. Step 5: Solve for x
    x = 18,920,426,730.94/155,917.11
  6. Step 6: Final answer
    x = 121,349.27

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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.