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Finding the Fourth Proportional to 127,408.80, 191,064.60 and 38,632.80

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Solution

The fourth proportional to 127,408.80, 191,064.60 and 38,632.80 is: 57,934.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,408.80 : 191,064.60 = 38,632.80 : x
  2. Step 2: Convert to fraction form
    127,408.80/191,064.60 = 38,632.80/x
  3. Step 3: Cross multiply
    127,408.80x = 191,064.60 × 38,632.80
  4. Step 4: Simplify right side
    127,408.80x = 7,381,360,478.88
  5. Step 5: Solve for x
    x = 7,381,360,478.88/127,408.80
  6. Step 6: Final answer
    x = 57,934.46

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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.