Home / 138,251.68-190,787.70-77,823.25

Finding the Fourth Proportional to 138,251.68, 190,787.70 and 77,823.25

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Solution

The fourth proportional to 138,251.68, 190,787.70 and 77,823.25 is: 107,396.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,251.68 : 190,787.70 = 77,823.25 : x
  2. Step 2: Convert to fraction form
    138,251.68/190,787.70 = 77,823.25/x
  3. Step 3: Cross multiply
    138,251.68x = 190,787.70 × 77,823.25
  4. Step 4: Simplify right side
    138,251.68x = 14,847,718,874.03
  5. Step 5: Solve for x
    x = 14,847,718,874.03/138,251.68
  6. Step 6: Final answer
    x = 107,396.30

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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.