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Finding the Fourth Proportional to 207,309.47, 310,963.15 and 80,962.54

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Solution

The fourth proportional to 207,309.47, 310,963.15 and 80,962.54 is: 121,443.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,309.47 : 310,963.15 = 80,962.54 : x
  2. Step 2: Convert to fraction form
    207,309.47/310,963.15 = 80,962.54/x
  3. Step 3: Cross multiply
    207,309.47x = 310,963.15 × 80,962.54
  4. Step 4: Simplify right side
    207,309.47x = 25,176,366,470.40
  5. Step 5: Solve for x
    x = 25,176,366,470.40/207,309.47
  6. Step 6: Final answer
    x = 121,443.40

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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.