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Finding the Fourth Proportional to 207,345.90, 311,004.06 and 80,962.48

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Solution

The fourth proportional to 207,345.90, 311,004.06 and 80,962.48 is: 121,437.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,345.90 : 311,004.06 = 80,962.48 : x
  2. Step 2: Convert to fraction form
    207,345.90/311,004.06 = 80,962.48/x
  3. Step 3: Cross multiply
    207,345.90x = 311,004.06 × 80,962.48
  4. Step 4: Simplify right side
    207,345.90x = 25,179,659,987.67
  5. Step 5: Solve for x
    x = 25,179,659,987.67/207,345.90
  6. Step 6: Final answer
    x = 121,437.94

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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.