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Finding the Fourth Proportional to 89,620.40, 134,430.60 and 73,217.90

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Solution

The fourth proportional to 89,620.40, 134,430.60 and 73,217.90 is: 109,826.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,620.40 : 134,430.60 = 73,217.90 : x
  2. Step 2: Convert to fraction form
    89,620.40/134,430.60 = 73,217.90/x
  3. Step 3: Cross multiply
    89,620.40x = 134,430.60 × 73,217.90
  4. Step 4: Simplify right side
    89,620.40x = 9,842,726,227.74
  5. Step 5: Solve for x
    x = 9,842,726,227.74/89,620.40
  6. Step 6: Final answer
    x = 109,826.85

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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.