Home / 81,965.76-113,118.12-61,787.04

Finding the Fourth Proportional to 81,965.76, 113,118.12 and 61,787.04

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Solution

The fourth proportional to 81,965.76, 113,118.12 and 61,787.04 is: 85,270.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,965.76 : 113,118.12 = 61,787.04 : x
  2. Step 2: Convert to fraction form
    81,965.76/113,118.12 = 61,787.04/x
  3. Step 3: Cross multiply
    81,965.76x = 113,118.12 × 61,787.04
  4. Step 4: Simplify right side
    81,965.76x = 6,989,233,805.16
  5. Step 5: Solve for x
    x = 6,989,233,805.16/81,965.76
  6. Step 6: Final answer
    x = 85,270.16

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1.5x scale

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.