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Finding the Fourth Proportional to 89,810.20, 134,715.30 and 75,986.20

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Solution

The fourth proportional to 89,810.20, 134,715.30 and 75,986.20 is: 113,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,810.20 : 134,715.30 = 75,986.20 : x
  2. Step 2: Convert to fraction form
    89,810.20/134,715.30 = 75,986.20/x
  3. Step 3: Cross multiply
    89,810.20x = 134,715.30 × 75,986.20
  4. Step 4: Simplify right side
    89,810.20x = 10,236,503,728.86
  5. Step 5: Solve for x
    x = 10,236,503,728.86/89,810.20
  6. Step 6: Final answer
    x = 113,979.30

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1.5x scale

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.