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Finding the Fourth Proportional to 85,357.79, 117,671.32 and 67,177

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Solution

The fourth proportional to 85,357.79, 117,671.32 and 67,177 is: 92,607.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,357.79 : 117,671.32 = 67,177 : x
  2. Step 2: Convert to fraction form
    85,357.79/117,671.32 = 67,177/x
  3. Step 3: Cross multiply
    85,357.79x = 117,671.32 × 67,177
  4. Step 4: Simplify right side
    85,357.79x = 7,904,806,263.64
  5. Step 5: Solve for x
    x = 7,904,806,263.64/85,357.79
  6. Step 6: Final answer
    x = 92,607.91

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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.