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Finding the Fourth Proportional to 124,990.88, 172,486.66 and 71,274.74

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Solution

The fourth proportional to 124,990.88, 172,486.66 and 71,274.74 is: 98,358.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,990.88 : 172,486.66 = 71,274.74 : x
  2. Step 2: Convert to fraction form
    124,990.88/172,486.66 = 71,274.74/x
  3. Step 3: Cross multiply
    124,990.88x = 172,486.66 × 71,274.74
  4. Step 4: Simplify right side
    124,990.88x = 12,293,941,844.97
  5. Step 5: Solve for x
    x = 12,293,941,844.97/124,990.88
  6. Step 6: Final answer
    x = 98,358.71

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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.