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Finding the Fourth Proportional to 200,486.80, 300,811.20 and 88,188.40

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Solution

The fourth proportional to 200,486.80, 300,811.20 and 88,188.40 is: 132,318.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,486.80 : 300,811.20 = 88,188.40 : x
  2. Step 2: Convert to fraction form
    200,486.80/300,811.20 = 88,188.40/x
  3. Step 3: Cross multiply
    200,486.80x = 300,811.20 × 88,188.40
  4. Step 4: Simplify right side
    200,486.80x = 26,528,058,430.08
  5. Step 5: Solve for x
    x = 26,528,058,430.08/200,486.80
  6. Step 6: Final answer
    x = 132,318.23

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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.