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Finding the Fourth Proportional to 84,787.20, 127,180.80 and 79,948.80

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Solution

The fourth proportional to 84,787.20, 127,180.80 and 79,948.80 is: 119,923.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,787.20 : 127,180.80 = 79,948.80 : x
  2. Step 2: Convert to fraction form
    84,787.20/127,180.80 = 79,948.80/x
  3. Step 3: Cross multiply
    84,787.20x = 127,180.80 × 79,948.80
  4. Step 4: Simplify right side
    84,787.20x = 10,167,952,343.04
  5. Step 5: Solve for x
    x = 10,167,952,343.04/84,787.20
  6. Step 6: Final answer
    x = 119,923.20

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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.