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Finding the Fourth Proportional to 207,666.70, 311,500.05 and 136,807.90

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Solution

The fourth proportional to 207,666.70, 311,500.05 and 136,807.90 is: 205,211.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,666.70 : 311,500.05 = 136,807.90 : x
  2. Step 2: Convert to fraction form
    207,666.70/311,500.05 = 136,807.90/x
  3. Step 3: Cross multiply
    207,666.70x = 311,500.05 × 136,807.90
  4. Step 4: Simplify right side
    207,666.70x = 42,615,667,690.40
  5. Step 5: Solve for x
    x = 42,615,667,690.40/207,666.70
  6. Step 6: Final answer
    x = 205,211.85

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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.