Home / 127,129.78-175,438.92-69,769.42

Finding the Fourth Proportional to 127,129.78, 175,438.92 and 69,769.42

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Solution

The fourth proportional to 127,129.78, 175,438.92 and 69,769.42 is: 96,281.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,129.78 : 175,438.92 = 69,769.42 : x
  2. Step 2: Convert to fraction form
    127,129.78/175,438.92 = 69,769.42/x
  3. Step 3: Cross multiply
    127,129.78x = 175,438.92 × 69,769.42
  4. Step 4: Simplify right side
    127,129.78x = 12,240,271,693.83
  5. Step 5: Solve for x
    x = 12,240,271,693.83/127,129.78
  6. Step 6: Final answer
    x = 96,281.70

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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.