Home / 155,865.72-215,090.37-87,882.09

Finding the Fourth Proportional to 155,865.72, 215,090.37 and 87,882.09

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Solution

The fourth proportional to 155,865.72, 215,090.37 and 87,882.09 is: 121,274.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,865.72 : 215,090.37 = 87,882.09 : x
  2. Step 2: Convert to fraction form
    155,865.72/215,090.37 = 87,882.09/x
  3. Step 3: Cross multiply
    155,865.72x = 215,090.37 × 87,882.09
  4. Step 4: Simplify right side
    155,865.72x = 18,902,591,254.47
  5. Step 5: Solve for x
    x = 18,902,591,254.47/155,865.72
  6. Step 6: Final answer
    x = 121,274.85

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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.