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Finding the Fourth Proportional to 84,872.80, 127,136.40 and 43,343.20

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Solution

The fourth proportional to 84,872.80, 127,136.40 and 43,343.20 is: 64,926.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,872.80 : 127,136.40 = 43,343.20 : x
  2. Step 2: Convert to fraction form
    84,872.80/127,136.40 = 43,343.20/x
  3. Step 3: Cross multiply
    84,872.80x = 127,136.40 × 43,343.20
  4. Step 4: Simplify right side
    84,872.80x = 5,510,498,412.48
  5. Step 5: Solve for x
    x = 5,510,498,412.48/84,872.80
  6. Step 6: Final answer
    x = 64,926.55

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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.