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Finding the Fourth Proportional to 127,408.60, 191,135.85 and 52,487.79

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Solution

The fourth proportional to 127,408.60, 191,135.85 and 52,487.79 is: 78,741.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,408.60 : 191,135.85 = 52,487.79 : x
  2. Step 2: Convert to fraction form
    127,408.60/191,135.85 = 52,487.79/x
  3. Step 3: Cross multiply
    127,408.60x = 191,135.85 × 52,487.79
  4. Step 4: Simplify right side
    127,408.60x = 10,032,298,356.27
  5. Step 5: Solve for x
    x = 10,032,298,356.27/127,408.60
  6. Step 6: Final answer
    x = 78,741.14

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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.