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Finding the Fourth Proportional to 142,721.60, 213,936.60 and 83,526.80

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Solution

The fourth proportional to 142,721.60, 213,936.60 and 83,526.80 is: 125,204.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,721.60 : 213,936.60 = 83,526.80 : x
  2. Step 2: Convert to fraction form
    142,721.60/213,936.60 = 83,526.80/x
  3. Step 3: Cross multiply
    142,721.60x = 213,936.60 × 83,526.80
  4. Step 4: Simplify right side
    142,721.60x = 17,869,439,600.88
  5. Step 5: Solve for x
    x = 17,869,439,600.88/142,721.60
  6. Step 6: Final answer
    x = 125,204.87

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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.