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Finding the Fourth Proportional to 69,135.78, 95,402.43 and 38,919.54

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Solution

The fourth proportional to 69,135.78, 95,402.43 and 38,919.54 is: 53,706.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,135.78 : 95,402.43 = 38,919.54 : x
  2. Step 2: Convert to fraction form
    69,135.78/95,402.43 = 38,919.54/x
  3. Step 3: Cross multiply
    69,135.78x = 95,402.43 × 38,919.54
  4. Step 4: Simplify right side
    69,135.78x = 3,713,018,690.48
  5. Step 5: Solve for x
    x = 3,713,018,690.48/69,135.78
  6. Step 6: Final answer
    x = 53,706.18

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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.