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Finding the Fourth Proportional to 85,356.79, 117,669.94 and 67,176

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Solution

The fourth proportional to 85,356.79, 117,669.94 and 67,176 is: 92,606.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,356.79 : 117,669.94 = 67,176 : x
  2. Step 2: Convert to fraction form
    85,356.79/117,669.94 = 67,176/x
  3. Step 3: Cross multiply
    85,356.79x = 117,669.94 × 67,176
  4. Step 4: Simplify right side
    85,356.79x = 7,904,595,721.50
  5. Step 5: Solve for x
    x = 7,904,595,721.50/85,356.79
  6. Step 6: Final answer
    x = 92,606.53

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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.