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Finding the Fourth Proportional to 201,631.70, 302,447.55 and 83,387.90

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Solution

The fourth proportional to 201,631.70, 302,447.55 and 83,387.90 is: 125,081.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,631.70 : 302,447.55 = 83,387.90 : x
  2. Step 2: Convert to fraction form
    201,631.70/302,447.55 = 83,387.90/x
  3. Step 3: Cross multiply
    201,631.70x = 302,447.55 × 83,387.90
  4. Step 4: Simplify right side
    201,631.70x = 25,220,466,054.65
  5. Step 5: Solve for x
    x = 25,220,466,054.65/201,631.70
  6. Step 6: Final answer
    x = 125,081.85

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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.