Home / 281,319.38-421,835.54-91,657.79

Finding the Fourth Proportional to 281,319.38, 421,835.54 and 91,657.79

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Solution

The fourth proportional to 281,319.38, 421,835.54 and 91,657.79 is: 137,439.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,319.38 : 421,835.54 = 91,657.79 : x
  2. Step 2: Convert to fraction form
    281,319.38/421,835.54 = 91,657.79/x
  3. Step 3: Cross multiply
    281,319.38x = 421,835.54 × 91,657.79
  4. Step 4: Simplify right side
    281,319.38x = 38,664,510,772.39
  5. Step 5: Solve for x
    x = 38,664,510,772.39/281,319.38
  6. Step 6: Final answer
    x = 137,439.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.