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Finding the Fourth Proportional to 125,686.78, 173,448.88 and 68,326.21

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Solution

The fourth proportional to 125,686.78, 173,448.88 and 68,326.21 is: 94,290.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,686.78 : 173,448.88 = 68,326.21 : x
  2. Step 2: Convert to fraction form
    125,686.78/173,448.88 = 68,326.21/x
  3. Step 3: Cross multiply
    125,686.78x = 173,448.88 × 68,326.21
  4. Step 4: Simplify right side
    125,686.78x = 11,851,103,390.27
  5. Step 5: Solve for x
    x = 11,851,103,390.27/125,686.78
  6. Step 6: Final answer
    x = 94,290.77

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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.