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Finding the Fourth Proportional to 207,154.45, 310,895.70 and 80,855.20

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Solution

The fourth proportional to 207,154.45, 310,895.70 and 80,855.20 is: 121,346.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,154.45 : 310,895.70 = 80,855.20 : x
  2. Step 2: Convert to fraction form
    207,154.45/310,895.70 = 80,855.20/x
  3. Step 3: Cross multiply
    207,154.45x = 310,895.70 × 80,855.20
  4. Step 4: Simplify right side
    207,154.45x = 25,137,534,002.64
  5. Step 5: Solve for x
    x = 25,137,534,002.64/207,154.45
  6. Step 6: Final answer
    x = 121,346.82

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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.