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Finding the Fourth Proportional to 125,512.80, 188,269.20 and 75,746.40

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Solution

The fourth proportional to 125,512.80, 188,269.20 and 75,746.40 is: 113,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,512.80 : 188,269.20 = 75,746.40 : x
  2. Step 2: Convert to fraction form
    125,512.80/188,269.20 = 75,746.40/x
  3. Step 3: Cross multiply
    125,512.80x = 188,269.20 × 75,746.40
  4. Step 4: Simplify right side
    125,512.80x = 14,260,714,130.88
  5. Step 5: Solve for x
    x = 14,260,714,130.88/125,512.80
  6. Step 6: Final answer
    x = 113,619.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.