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Finding the Fourth Proportional to 254,911.20, 382,374.06 and 86,432

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Solution

The fourth proportional to 254,911.20, 382,374.06 and 86,432 is: 129,650.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,911.20 : 382,374.06 = 86,432 : x
  2. Step 2: Convert to fraction form
    254,911.20/382,374.06 = 86,432/x
  3. Step 3: Cross multiply
    254,911.20x = 382,374.06 × 86,432
  4. Step 4: Simplify right side
    254,911.20x = 33,049,354,753.92
  5. Step 5: Solve for x
    x = 33,049,354,753.92/254,911.20
  6. Step 6: Final answer
    x = 129,650.46

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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.