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Finding the Fourth Proportional to 158,855.31, 219,221.87 and 87,236.87

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Solution

The fourth proportional to 158,855.31, 219,221.87 and 87,236.87 is: 120,387.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,855.31 : 219,221.87 = 87,236.87 : x
  2. Step 2: Convert to fraction form
    158,855.31/219,221.87 = 87,236.87/x
  3. Step 3: Cross multiply
    158,855.31x = 219,221.87 × 87,236.87
  4. Step 4: Simplify right side
    158,855.31x = 19,124,228,242.05
  5. Step 5: Solve for x
    x = 19,124,228,242.05/158,855.31
  6. Step 6: Final answer
    x = 120,387.72

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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.