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Finding the Fourth Proportional to 124,408.40, 186,612.60 and 71,790.80

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Solution

The fourth proportional to 124,408.40, 186,612.60 and 71,790.80 is: 107,686.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,408.40 : 186,612.60 = 71,790.80 : x
  2. Step 2: Convert to fraction form
    124,408.40/186,612.60 = 71,790.80/x
  3. Step 3: Cross multiply
    124,408.40x = 186,612.60 × 71,790.80
  4. Step 4: Simplify right side
    124,408.40x = 13,397,067,844.08
  5. Step 5: Solve for x
    x = 13,397,067,844.08/124,408.40
  6. Step 6: Final answer
    x = 107,686.20

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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.