Home / 89,639.76-123,436.08-87,650.70

Finding the Fourth Proportional to 89,639.76, 123,436.08 and 87,650.70

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Solution

The fourth proportional to 89,639.76, 123,436.08 and 87,650.70 is: 120,697.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,639.76 : 123,436.08 = 87,650.70 : x
  2. Step 2: Convert to fraction form
    89,639.76/123,436.08 = 87,650.70/x
  3. Step 3: Cross multiply
    89,639.76x = 123,436.08 × 87,650.70
  4. Step 4: Simplify right side
    89,639.76x = 10,819,258,817.26
  5. Step 5: Solve for x
    x = 10,819,258,817.26/89,639.76
  6. Step 6: Final answer
    x = 120,697.10

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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.