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Finding the Fourth Proportional to 247,521.60, 371,282.40 and 81,309.60

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Solution

The fourth proportional to 247,521.60, 371,282.40 and 81,309.60 is: 121,964.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,521.60 : 371,282.40 = 81,309.60 : x
  2. Step 2: Convert to fraction form
    247,521.60/371,282.40 = 81,309.60/x
  3. Step 3: Cross multiply
    247,521.60x = 371,282.40 × 81,309.60
  4. Step 4: Simplify right side
    247,521.60x = 30,188,823,431.04
  5. Step 5: Solve for x
    x = 30,188,823,431.04/247,521.60
  6. Step 6: Final answer
    x = 121,964.40

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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.