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Finding the Fourth Proportional to 247,979.70, 371,969.55 and 81,746.10

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Solution

The fourth proportional to 247,979.70, 371,969.55 and 81,746.10 is: 122,619.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,979.70 : 371,969.55 = 81,746.10 : x
  2. Step 2: Convert to fraction form
    247,979.70/371,969.55 = 81,746.10/x
  3. Step 3: Cross multiply
    247,979.70x = 371,969.55 × 81,746.10
  4. Step 4: Simplify right side
    247,979.70x = 30,407,060,031.26
  5. Step 5: Solve for x
    x = 30,407,060,031.26/247,979.70
  6. Step 6: Final answer
    x = 122,619.15

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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.