Home / 187,020.90-280,431.63-81,716.58

Finding the Fourth Proportional to 187,020.90, 280,431.63 and 81,716.58

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Solution

The fourth proportional to 187,020.90, 280,431.63 and 81,716.58 is: 122,531.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,020.90 : 280,431.63 = 81,716.58 : x
  2. Step 2: Convert to fraction form
    187,020.90/280,431.63 = 81,716.58/x
  3. Step 3: Cross multiply
    187,020.90x = 280,431.63 × 81,716.58
  4. Step 4: Simplify right side
    187,020.90x = 22,915,913,727.43
  5. Step 5: Solve for x
    x = 22,915,913,727.43/187,020.90
  6. Step 6: Final answer
    x = 122,531.30

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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.