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Finding the Fourth Proportional to 67,640.94, 93,338.34 and 38,953

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Solution

The fourth proportional to 67,640.94, 93,338.34 and 38,953 is: 53,751.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,640.94 : 93,338.34 = 38,953 : x
  2. Step 2: Convert to fraction form
    67,640.94/93,338.34 = 38,953/x
  3. Step 3: Cross multiply
    67,640.94x = 93,338.34 × 38,953
  4. Step 4: Simplify right side
    67,640.94x = 3,635,808,358.02
  5. Step 5: Solve for x
    x = 3,635,808,358.02/67,640.94
  6. Step 6: Final answer
    x = 53,751.59

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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.