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Finding the Fourth Proportional to 127,862.80, 191,722.20 and 48,979.60

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Solution

The fourth proportional to 127,862.80, 191,722.20 and 48,979.60 is: 73,441.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,862.80 : 191,722.20 = 48,979.60 : x
  2. Step 2: Convert to fraction form
    127,862.80/191,722.20 = 48,979.60/x
  3. Step 3: Cross multiply
    127,862.80x = 191,722.20 × 48,979.60
  4. Step 4: Simplify right side
    127,862.80x = 9,390,476,667.12
  5. Step 5: Solve for x
    x = 9,390,476,667.12/127,862.80
  6. Step 6: Final answer
    x = 73,441.82

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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.