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Finding the Fourth Proportional to 72,614.78, 108,825.26 and 38,811.50

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Solution

The fourth proportional to 72,614.78, 108,825.26 and 38,811.50 is: 58,165.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,614.78 : 108,825.26 = 38,811.50 : x
  2. Step 2: Convert to fraction form
    72,614.78/108,825.26 = 38,811.50/x
  3. Step 3: Cross multiply
    72,614.78x = 108,825.26 × 38,811.50
  4. Step 4: Simplify right side
    72,614.78x = 4,223,671,578.49
  5. Step 5: Solve for x
    x = 4,223,671,578.49/72,614.78
  6. Step 6: Final answer
    x = 58,165.45

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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.