Home / 142,957.20-197,198.40-89,148.80

Finding the Fourth Proportional to 142,957.20, 197,198.40 and 89,148.80

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Solution

The fourth proportional to 142,957.20, 197,198.40 and 89,148.80 is: 122,973.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,957.20 : 197,198.40 = 89,148.80 : x
  2. Step 2: Convert to fraction form
    142,957.20/197,198.40 = 89,148.80/x
  3. Step 3: Cross multiply
    142,957.20x = 197,198.40 × 89,148.80
  4. Step 4: Simplify right side
    142,957.20x = 17,580,000,721.92
  5. Step 5: Solve for x
    x = 17,580,000,721.92/142,957.20
  6. Step 6: Final answer
    x = 122,973.87

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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.