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Finding the Fourth Proportional to 138,152.40, 207,228.60 and 49,408.80

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Solution

The fourth proportional to 138,152.40, 207,228.60 and 49,408.80 is: 74,113.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,152.40 : 207,228.60 = 49,408.80 : x
  2. Step 2: Convert to fraction form
    138,152.40/207,228.60 = 49,408.80/x
  3. Step 3: Cross multiply
    138,152.40x = 207,228.60 × 49,408.80
  4. Step 4: Simplify right side
    138,152.40x = 10,238,916,451.68
  5. Step 5: Solve for x
    x = 10,238,916,451.68/138,152.40
  6. Step 6: Final answer
    x = 74,113.20

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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.