Home / 89,138.10-122,939.72-75,753.66

Finding the Fourth Proportional to 89,138.10, 122,939.72 and 75,753.66

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Solution

The fourth proportional to 89,138.10, 122,939.72 and 75,753.66 is: 104,479.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,138.10 : 122,939.72 = 75,753.66 : x
  2. Step 2: Convert to fraction form
    89,138.10/122,939.72 = 75,753.66/x
  3. Step 3: Cross multiply
    89,138.10x = 122,939.72 × 75,753.66
  4. Step 4: Simplify right side
    89,138.10x = 9,313,134,541.82
  5. Step 5: Solve for x
    x = 9,313,134,541.82/89,138.10
  6. Step 6: Final answer
    x = 104,479.84

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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.