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Finding the Fourth Proportional to 68,440.78, 94,449 and 40,146.94

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Solution

The fourth proportional to 68,440.78, 94,449 and 40,146.94 is: 55,403.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,440.78 : 94,449 = 40,146.94 : x
  2. Step 2: Convert to fraction form
    68,440.78/94,449 = 40,146.94/x
  3. Step 3: Cross multiply
    68,440.78x = 94,449 × 40,146.94
  4. Step 4: Simplify right side
    68,440.78x = 3,791,838,336.06
  5. Step 5: Solve for x
    x = 3,791,838,336.06/68,440.78
  6. Step 6: Final answer
    x = 55,403.20

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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.