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Finding the Fourth Proportional to 127,680.64, 191,600.80 and 48,801.60

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Solution

The fourth proportional to 127,680.64, 191,600.80 and 48,801.60 is: 73,232.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,680.64 : 191,600.80 = 48,801.60 : x
  2. Step 2: Convert to fraction form
    127,680.64/191,600.80 = 48,801.60/x
  3. Step 3: Cross multiply
    127,680.64x = 191,600.80 × 48,801.60
  4. Step 4: Simplify right side
    127,680.64x = 9,350,425,601.28
  5. Step 5: Solve for x
    x = 9,350,425,601.28/127,680.64
  6. Step 6: Final answer
    x = 73,232.92

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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.