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Finding the Fourth Proportional to 206,603.10, 309,904.65 and 73,487.70

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Solution

The fourth proportional to 206,603.10, 309,904.65 and 73,487.70 is: 110,231.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,603.10 : 309,904.65 = 73,487.70 : x
  2. Step 2: Convert to fraction form
    206,603.10/309,904.65 = 73,487.70/x
  3. Step 3: Cross multiply
    206,603.10x = 309,904.65 × 73,487.70
  4. Step 4: Simplify right side
    206,603.10x = 22,774,179,947.81
  5. Step 5: Solve for x
    x = 22,774,179,947.81/206,603.10
  6. Step 6: Final answer
    x = 110,231.55

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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.