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Finding the Fourth Proportional to 124,701.78, 172,089.30 and 68,113.14

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Solution

The fourth proportional to 124,701.78, 172,089.30 and 68,113.14 is: 93,996.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,701.78 : 172,089.30 = 68,113.14 : x
  2. Step 2: Convert to fraction form
    124,701.78/172,089.30 = 68,113.14/x
  3. Step 3: Cross multiply
    124,701.78x = 172,089.30 × 68,113.14
  4. Step 4: Simplify right side
    124,701.78x = 11,721,542,583.40
  5. Step 5: Solve for x
    x = 11,721,542,583.40/124,701.78
  6. Step 6: Final answer
    x = 93,996.59

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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.