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Finding the Fourth Proportional to 68,119.38, 102,085.92 and 51,465.78

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Solution

The fourth proportional to 68,119.38, 102,085.92 and 51,465.78 is: 77,128.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,119.38 : 102,085.92 = 51,465.78 : x
  2. Step 2: Convert to fraction form
    68,119.38/102,085.92 = 51,465.78/x
  3. Step 3: Cross multiply
    68,119.38x = 102,085.92 × 51,465.78
  4. Step 4: Simplify right side
    68,119.38x = 5,253,931,499.82
  5. Step 5: Solve for x
    x = 5,253,931,499.82/68,119.38
  6. Step 6: Final answer
    x = 77,128.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.