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Finding the Fourth Proportional to 127,768.60, 191,725.80 and 48,939.40

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Solution

The fourth proportional to 127,768.60, 191,725.80 and 48,939.40 is: 73,437.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,768.60 : 191,725.80 = 48,939.40 : x
  2. Step 2: Convert to fraction form
    127,768.60/191,725.80 = 48,939.40/x
  3. Step 3: Cross multiply
    127,768.60x = 191,725.80 × 48,939.40
  4. Step 4: Simplify right side
    127,768.60x = 9,382,945,616.52
  5. Step 5: Solve for x
    x = 9,382,945,616.52/127,768.60
  6. Step 6: Final answer
    x = 73,437.02

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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.