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Finding the Fourth Proportional to 201,617.40, 302,426.10 and 138,631.80

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Solution

The fourth proportional to 201,617.40, 302,426.10 and 138,631.80 is: 207,947.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,617.40 : 302,426.10 = 138,631.80 : x
  2. Step 2: Convert to fraction form
    201,617.40/302,426.10 = 138,631.80/x
  3. Step 3: Cross multiply
    201,617.40x = 302,426.10 × 138,631.80
  4. Step 4: Simplify right side
    201,617.40x = 41,925,874,609.98
  5. Step 5: Solve for x
    x = 41,925,874,609.98/201,617.40
  6. Step 6: Final answer
    x = 207,947.70

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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.