Home / 81,432.31-122,164.78-28,126.24

Finding the Fourth Proportional to 81,432.31, 122,164.78 and 28,126.24

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Solution

The fourth proportional to 81,432.31, 122,164.78 and 28,126.24 is: 42,195.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,432.31 : 122,164.78 = 28,126.24 : x
  2. Step 2: Convert to fraction form
    81,432.31/122,164.78 = 28,126.24/x
  3. Step 3: Cross multiply
    81,432.31x = 122,164.78 × 28,126.24
  4. Step 4: Simplify right side
    81,432.31x = 3,436,035,921.83
  5. Step 5: Solve for x
    x = 3,436,035,921.83/81,432.31
  6. Step 6: Final answer
    x = 42,195.00

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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.