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Finding the Fourth Proportional to 125,628.10, 188,442.15 and 108,520.90

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Solution

The fourth proportional to 125,628.10, 188,442.15 and 108,520.90 is: 162,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,628.10 : 188,442.15 = 108,520.90 : x
  2. Step 2: Convert to fraction form
    125,628.10/188,442.15 = 108,520.90/x
  3. Step 3: Cross multiply
    125,628.10x = 188,442.15 × 108,520.90
  4. Step 4: Simplify right side
    125,628.10x = 20,449,911,715.94
  5. Step 5: Solve for x
    x = 20,449,911,715.94/125,628.10
  6. Step 6: Final answer
    x = 162,781.35

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1.5x scale

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.