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Finding the Fourth Proportional to 72,876.69, 109,331.78 and 37,808.55

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Solution

The fourth proportional to 72,876.69, 109,331.78 and 37,808.55 is: 56,721.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,876.69 : 109,331.78 = 37,808.55 : x
  2. Step 2: Convert to fraction form
    72,876.69/109,331.78 = 37,808.55/x
  3. Step 3: Cross multiply
    72,876.69x = 109,331.78 × 37,808.55
  4. Step 4: Simplify right side
    72,876.69x = 4,133,675,881.68
  5. Step 5: Solve for x
    x = 4,133,675,881.68/72,876.69
  6. Step 6: Final answer
    x = 56,721.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.