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Finding the Fourth Proportional to 206,715.40, 310,101.90 and 88,385.80

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Solution

The fourth proportional to 206,715.40, 310,101.90 and 88,385.80 is: 132,591.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,715.40 : 310,101.90 = 88,385.80 : x
  2. Step 2: Convert to fraction form
    206,715.40/310,101.90 = 88,385.80/x
  3. Step 3: Cross multiply
    206,715.40x = 310,101.90 × 88,385.80
  4. Step 4: Simplify right side
    206,715.40x = 27,408,604,513.02
  5. Step 5: Solve for x
    x = 27,408,604,513.02/206,715.40
  6. Step 6: Final answer
    x = 132,591.01

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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.