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Finding the Fourth Proportional to 68,785.40, 94,943.54 and 40,507.50

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Solution

The fourth proportional to 68,785.40, 94,943.54 and 40,507.50 is: 55,911.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,785.40 : 94,943.54 = 40,507.50 : x
  2. Step 2: Convert to fraction form
    68,785.40/94,943.54 = 40,507.50/x
  3. Step 3: Cross multiply
    68,785.40x = 94,943.54 × 40,507.50
  4. Step 4: Simplify right side
    68,785.40x = 3,845,925,446.55
  5. Step 5: Solve for x
    x = 3,845,925,446.55/68,785.40
  6. Step 6: Final answer
    x = 55,911.94

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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.