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Finding the Fourth Proportional to 139,726.17, 192,848.70 and 79,302.48

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Solution

The fourth proportional to 139,726.17, 192,848.70 and 79,302.48 is: 109,452.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,726.17 : 192,848.70 = 79,302.48 : x
  2. Step 2: Convert to fraction form
    139,726.17/192,848.70 = 79,302.48/x
  3. Step 3: Cross multiply
    139,726.17x = 192,848.70 × 79,302.48
  4. Step 4: Simplify right side
    139,726.17x = 15,293,380,174.78
  5. Step 5: Solve for x
    x = 15,293,380,174.78/139,726.17
  6. Step 6: Final answer
    x = 109,452.51

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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.