Home / 131,787.89-181,867.40-71,358.57

Finding the Fourth Proportional to 131,787.89, 181,867.40 and 71,358.57

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Solution

The fourth proportional to 131,787.89, 181,867.40 and 71,358.57 is: 98,474.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,787.89 : 181,867.40 = 71,358.57 : x
  2. Step 2: Convert to fraction form
    131,787.89/181,867.40 = 71,358.57/x
  3. Step 3: Cross multiply
    131,787.89x = 181,867.40 × 71,358.57
  4. Step 4: Simplify right side
    131,787.89x = 12,977,797,772.01
  5. Step 5: Solve for x
    x = 12,977,797,772.01/131,787.89
  6. Step 6: Final answer
    x = 98,474.89

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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.