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Finding the Fourth Proportional to 125,069.38, 172,595.76 and 68,480.78

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Solution

The fourth proportional to 125,069.38, 172,595.76 and 68,480.78 is: 94,503.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,069.38 : 172,595.76 = 68,480.78 : x
  2. Step 2: Convert to fraction form
    125,069.38/172,595.76 = 68,480.78/x
  3. Step 3: Cross multiply
    125,069.38x = 172,595.76 × 68,480.78
  4. Step 4: Simplify right side
    125,069.38x = 11,819,492,269.49
  5. Step 5: Solve for x
    x = 11,819,492,269.49/125,069.38
  6. Step 6: Final answer
    x = 94,503.48

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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.