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Finding the Fourth Proportional to 125,151, 172,708.38 and 74,850

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Solution

The fourth proportional to 125,151, 172,708.38 and 74,850 is: 103,293

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,151 : 172,708.38 = 74,850 : x
  2. Step 2: Convert to fraction form
    125,151/172,708.38 = 74,850/x
  3. Step 3: Cross multiply
    125,151x = 172,708.38 × 74,850
  4. Step 4: Simplify right side
    125,151x = 12,927,222,243
  5. Step 5: Solve for x
    x = 12,927,222,243/125,151
  6. Step 6: Final answer
    x = 103,293

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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.