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Finding the Fourth Proportional to 139,955.79, 193,132.01 and 79,518.45

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Solution

The fourth proportional to 139,955.79, 193,132.01 and 79,518.45 is: 109,731.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,955.79 : 193,132.01 = 79,518.45 : x
  2. Step 2: Convert to fraction form
    139,955.79/193,132.01 = 79,518.45/x
  3. Step 3: Cross multiply
    139,955.79x = 193,132.01 × 79,518.45
  4. Step 4: Simplify right side
    139,955.79x = 15,357,557,682.99
  5. Step 5: Solve for x
    x = 15,357,557,682.99/139,955.79
  6. Step 6: Final answer
    x = 109,731.49

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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.