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Finding the Fourth Proportional to 81,002.40, 121,406.40 and 41,539.20

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Solution

The fourth proportional to 81,002.40, 121,406.40 and 41,539.20 is: 62,258.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.40 : 121,406.40 = 41,539.20 : x
  2. Step 2: Convert to fraction form
    81,002.40/121,406.40 = 41,539.20/x
  3. Step 3: Cross multiply
    81,002.40x = 121,406.40 × 41,539.20
  4. Step 4: Simplify right side
    81,002.40x = 5,043,124,730.88
  5. Step 5: Solve for x
    x = 5,043,124,730.88/81,002.40
  6. Step 6: Final answer
    x = 62,258.95

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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.