Home / 155,817-215,022.90-87,837.96

Finding the Fourth Proportional to 155,817, 215,022.90 and 87,837.96

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Solution

The fourth proportional to 155,817, 215,022.90 and 87,837.96 is: 121,213.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,817 : 215,022.90 = 87,837.96 : x
  2. Step 2: Convert to fraction form
    155,817/215,022.90 = 87,837.96/x
  3. Step 3: Cross multiply
    155,817x = 215,022.90 × 87,837.96
  4. Step 4: Simplify right side
    155,817x = 18,887,172,889.28
  5. Step 5: Solve for x
    x = 18,887,172,889.28/155,817
  6. Step 6: Final answer
    x = 121,213.81

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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.