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Finding the Fourth Proportional to 125,788.32, 173,630.52 and 78,069.60

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Solution

The fourth proportional to 125,788.32, 173,630.52 and 78,069.60 is: 107,762.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,788.32 : 173,630.52 = 78,069.60 : x
  2. Step 2: Convert to fraction form
    125,788.32/173,630.52 = 78,069.60/x
  3. Step 3: Cross multiply
    125,788.32x = 173,630.52 × 78,069.60
  4. Step 4: Simplify right side
    125,788.32x = 13,555,265,244.19
  5. Step 5: Solve for x
    x = 13,555,265,244.19/125,788.32
  6. Step 6: Final answer
    x = 107,762.51

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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.