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Finding the Fourth Proportional to 139,044.03, 191,873.25 and 78,611.13

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Solution

The fourth proportional to 139,044.03, 191,873.25 and 78,611.13 is: 108,479.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,044.03 : 191,873.25 = 78,611.13 : x
  2. Step 2: Convert to fraction form
    139,044.03/191,873.25 = 78,611.13/x
  3. Step 3: Cross multiply
    139,044.03x = 191,873.25 × 78,611.13
  4. Step 4: Simplify right side
    139,044.03x = 15,083,372,999.27
  5. Step 5: Solve for x
    x = 15,083,372,999.27/139,044.03
  6. Step 6: Final answer
    x = 108,479.11

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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.