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Finding the Fourth Proportional to 81,230.40, 121,730.40 and 60,004.80

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Solution

The fourth proportional to 81,230.40, 121,730.40 and 60,004.80 is: 89,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,230.40 : 121,730.40 = 60,004.80 : x
  2. Step 2: Convert to fraction form
    81,230.40/121,730.40 = 60,004.80/x
  3. Step 3: Cross multiply
    81,230.40x = 121,730.40 × 60,004.80
  4. Step 4: Simplify right side
    81,230.40x = 7,304,408,305.92
  5. Step 5: Solve for x
    x = 7,304,408,305.92/81,230.40
  6. Step 6: Final answer
    x = 89,922.10

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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.