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Finding the Fourth Proportional to 207,939.80, 312,017.70 and 97,131.80

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Solution

The fourth proportional to 207,939.80, 312,017.70 and 97,131.80 is: 145,748.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,939.80 : 312,017.70 = 97,131.80 : x
  2. Step 2: Convert to fraction form
    207,939.80/312,017.70 = 97,131.80/x
  3. Step 3: Cross multiply
    207,939.80x = 312,017.70 × 97,131.80
  4. Step 4: Simplify right side
    207,939.80x = 30,306,840,832.86
  5. Step 5: Solve for x
    x = 30,306,840,832.86/207,939.80
  6. Step 6: Final answer
    x = 145,748.15

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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.