Home / 132,187.20-198,280.80-69,979.20

Finding the Fourth Proportional to 132,187.20, 198,280.80 and 69,979.20

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Solution

The fourth proportional to 132,187.20, 198,280.80 and 69,979.20 is: 104,968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,187.20 : 198,280.80 = 69,979.20 : x
  2. Step 2: Convert to fraction form
    132,187.20/198,280.80 = 69,979.20/x
  3. Step 3: Cross multiply
    132,187.20x = 198,280.80 × 69,979.20
  4. Step 4: Simplify right side
    132,187.20x = 13,875,531,759.36
  5. Step 5: Solve for x
    x = 13,875,531,759.36/132,187.20
  6. Step 6: Final answer
    x = 104,968.80

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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.