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Finding the Fourth Proportional to 89,607.69, 123,391.68 and 87,618.68

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Solution

The fourth proportional to 89,607.69, 123,391.68 and 87,618.68 is: 120,652.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,607.69 : 123,391.68 = 87,618.68 : x
  2. Step 2: Convert to fraction form
    89,607.69/123,391.68 = 87,618.68/x
  3. Step 3: Cross multiply
    89,607.69x = 123,391.68 × 87,618.68
  4. Step 4: Simplify right side
    89,607.69x = 10,811,415,507.62
  5. Step 5: Solve for x
    x = 10,811,415,507.62/89,607.69
  6. Step 6: Final answer
    x = 120,652.76

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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.