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Finding the Fourth Proportional to 89,615.44, 123,402.34 and 87,626.44

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Solution

The fourth proportional to 89,615.44, 123,402.34 and 87,626.44 is: 120,663.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,615.44 : 123,402.34 = 87,626.44 : x
  2. Step 2: Convert to fraction form
    89,615.44/123,402.34 = 87,626.44/x
  3. Step 3: Cross multiply
    89,615.44x = 123,402.34 × 87,626.44
  4. Step 4: Simplify right side
    89,615.44x = 10,813,307,741.87
  5. Step 5: Solve for x
    x = 10,813,307,741.87/89,615.44
  6. Step 6: Final answer
    x = 120,663.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.