Home / 89,853.12-123,999.12-52,129.80

Finding the Fourth Proportional to 89,853.12, 123,999.12 and 52,129.80

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Solution

The fourth proportional to 89,853.12, 123,999.12 and 52,129.80 is: 71,940.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,853.12 : 123,999.12 = 52,129.80 : x
  2. Step 2: Convert to fraction form
    89,853.12/123,999.12 = 52,129.80/x
  3. Step 3: Cross multiply
    89,853.12x = 123,999.12 × 52,129.80
  4. Step 4: Simplify right side
    89,853.12x = 6,464,049,325.78
  5. Step 5: Solve for x
    x = 6,464,049,325.78/89,853.12
  6. Step 6: Final answer
    x = 71,940.18

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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.