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Finding the Fourth Proportional to 68,785.94, 94,928.55 and 38,580.95

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Solution

The fourth proportional to 68,785.94, 94,928.55 and 38,580.95 is: 53,243.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,785.94 : 94,928.55 = 38,580.95 : x
  2. Step 2: Convert to fraction form
    68,785.94/94,928.55 = 38,580.95/x
  3. Step 3: Cross multiply
    68,785.94x = 94,928.55 × 38,580.95
  4. Step 4: Simplify right side
    68,785.94x = 3,662,433,641.12
  5. Step 5: Solve for x
    x = 3,662,433,641.12/68,785.94
  6. Step 6: Final answer
    x = 53,243.93

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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.