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Finding the Fourth Proportional to 127,407.60, 191,134.35 and 52,486.79

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Solution

The fourth proportional to 127,407.60, 191,134.35 and 52,486.79 is: 78,739.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,407.60 : 191,134.35 = 52,486.79 : x
  2. Step 2: Convert to fraction form
    127,407.60/191,134.35 = 52,486.79/x
  3. Step 3: Cross multiply
    127,407.60x = 191,134.35 × 52,486.79
  4. Step 4: Simplify right side
    127,407.60x = 10,032,027,534.56
  5. Step 5: Solve for x
    x = 10,032,027,534.56/127,407.60
  6. Step 6: Final answer
    x = 78,739.63

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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.