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Finding the Fourth Proportional to 100,082.66, 138,094.88 and 57,061.33

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Solution

The fourth proportional to 100,082.66, 138,094.88 and 57,061.33 is: 78,733.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,082.66 : 138,094.88 = 57,061.33 : x
  2. Step 2: Convert to fraction form
    100,082.66/138,094.88 = 57,061.33/x
  3. Step 3: Cross multiply
    100,082.66x = 138,094.88 × 57,061.33
  4. Step 4: Simplify right side
    100,082.66x = 7,879,876,888.45
  5. Step 5: Solve for x
    x = 7,879,876,888.45/100,082.66
  6. Step 6: Final answer
    x = 78,733.69

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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.