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Finding the Fourth Proportional to 65,843.48, 98,787.39 and 20,872.18

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Solution

The fourth proportional to 65,843.48, 98,787.39 and 20,872.18 is: 31,315.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,843.48 : 98,787.39 = 20,872.18 : x
  2. Step 2: Convert to fraction form
    65,843.48/98,787.39 = 20,872.18/x
  3. Step 3: Cross multiply
    65,843.48x = 98,787.39 × 20,872.18
  4. Step 4: Simplify right side
    65,843.48x = 2,061,908,267.71
  5. Step 5: Solve for x
    x = 2,061,908,267.71/65,843.48
  6. Step 6: Final answer
    x = 31,315.30

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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.