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Finding the Fourth Proportional to 139,955.86, 193,132.11 and 79,518.52

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Solution

The fourth proportional to 139,955.86, 193,132.11 and 79,518.52 is: 109,731.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,955.86 : 193,132.11 = 79,518.52 : x
  2. Step 2: Convert to fraction form
    139,955.86/193,132.11 = 79,518.52/x
  3. Step 3: Cross multiply
    139,955.86x = 193,132.11 × 79,518.52
  4. Step 4: Simplify right side
    139,955.86x = 15,357,579,551.68
  5. Step 5: Solve for x
    x = 15,357,579,551.68/139,955.86
  6. Step 6: Final answer
    x = 109,731.59

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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.