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Finding the Fourth Proportional to 139,927.13, 193,104.65 and 79,508.01

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Solution

The fourth proportional to 139,927.13, 193,104.65 and 79,508.01 is: 109,724.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,927.13 : 193,104.65 = 79,508.01 : x
  2. Step 2: Convert to fraction form
    139,927.13/193,104.65 = 79,508.01/x
  3. Step 3: Cross multiply
    139,927.13x = 193,104.65 × 79,508.01
  4. Step 4: Simplify right side
    139,927.13x = 15,353,366,045.71
  5. Step 5: Solve for x
    x = 15,353,366,045.71/139,927.13
  6. Step 6: Final answer
    x = 109,724.02

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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.