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Finding the Fourth Proportional to 125,181.32, 172,750.32 and 74,219.20

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Solution

The fourth proportional to 125,181.32, 172,750.32 and 74,219.20 is: 102,422.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,181.32 : 172,750.32 = 74,219.20 : x
  2. Step 2: Convert to fraction form
    125,181.32/172,750.32 = 74,219.20/x
  3. Step 3: Cross multiply
    125,181.32x = 172,750.32 × 74,219.20
  4. Step 4: Simplify right side
    125,181.32x = 12,821,390,550.14
  5. Step 5: Solve for x
    x = 12,821,390,550.14/125,181.32
  6. Step 6: Final answer
    x = 102,422.55

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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.