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Finding the Fourth Proportional to 125,679.28, 173,368.20 and 79,654.72

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Solution

The fourth proportional to 125,679.28, 173,368.20 and 79,654.72 is: 109,879.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,679.28 : 173,368.20 = 79,654.72 : x
  2. Step 2: Convert to fraction form
    125,679.28/173,368.20 = 79,654.72/x
  3. Step 3: Cross multiply
    125,679.28x = 173,368.20 × 79,654.72
  4. Step 4: Simplify right side
    125,679.28x = 13,809,595,427.90
  5. Step 5: Solve for x
    x = 13,809,595,427.90/125,679.28
  6. Step 6: Final answer
    x = 109,879.65

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1.5x scale

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.