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Finding the Fourth Proportional to 78,329.69, 108,092.09 and 42,518.92

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Solution

The fourth proportional to 78,329.69, 108,092.09 and 42,518.92 is: 58,674.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,329.69 : 108,092.09 = 42,518.92 : x
  2. Step 2: Convert to fraction form
    78,329.69/108,092.09 = 42,518.92/x
  3. Step 3: Cross multiply
    78,329.69x = 108,092.09 × 42,518.92
  4. Step 4: Simplify right side
    78,329.69x = 4,595,958,174.29
  5. Step 5: Solve for x
    x = 4,595,958,174.29/78,329.69
  6. Step 6: Final answer
    x = 58,674.54

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1.5x scale

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.