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Finding the Fourth Proportional to 125,899.50, 173,691.42 and 87,648.84

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Solution

The fourth proportional to 125,899.50, 173,691.42 and 87,648.84 is: 120,920.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,899.50 : 173,691.42 = 87,648.84 : x
  2. Step 2: Convert to fraction form
    125,899.50/173,691.42 = 87,648.84/x
  3. Step 3: Cross multiply
    125,899.50x = 173,691.42 × 87,648.84
  4. Step 4: Simplify right side
    125,899.50x = 15,223,851,480.95
  5. Step 5: Solve for x
    x = 15,223,851,480.95/125,899.50
  6. Step 6: Final answer
    x = 120,920.67

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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.