Home / 89,679.36-123,529.68-68,421.72

Finding the Fourth Proportional to 89,679.36, 123,529.68 and 68,421.72

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Solution

The fourth proportional to 89,679.36, 123,529.68 and 68,421.72 is: 94,248.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,679.36 : 123,529.68 = 68,421.72 : x
  2. Step 2: Convert to fraction form
    89,679.36/123,529.68 = 68,421.72/x
  3. Step 3: Cross multiply
    89,679.36x = 123,529.68 × 68,421.72
  4. Step 4: Simplify right side
    89,679.36x = 8,452,113,176.65
  5. Step 5: Solve for x
    x = 8,452,113,176.65/89,679.36
  6. Step 6: Final answer
    x = 94,248.14

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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.