Home / 155,943.80-215,184.36-87,961.89

Finding the Fourth Proportional to 155,943.80, 215,184.36 and 87,961.89

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Solution

The fourth proportional to 155,943.80, 215,184.36 and 87,961.89 is: 121,377.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,943.80 : 215,184.36 = 87,961.89 : x
  2. Step 2: Convert to fraction form
    155,943.80/215,184.36 = 87,961.89/x
  3. Step 3: Cross multiply
    155,943.80x = 215,184.36 × 87,961.89
  4. Step 4: Simplify right side
    155,943.80x = 18,928,023,004.04
  5. Step 5: Solve for x
    x = 18,928,023,004.04/155,943.80
  6. Step 6: Final answer
    x = 121,377.21

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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.