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Finding the Fourth Proportional to 139,356.38, 209,964.29 and 126,044.74

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Solution

The fourth proportional to 139,356.38, 209,964.29 and 126,044.74 is: 189,908.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,356.38 : 209,964.29 = 126,044.74 : x
  2. Step 2: Convert to fraction form
    139,356.38/209,964.29 = 126,044.74/x
  3. Step 3: Cross multiply
    139,356.38x = 209,964.29 × 126,044.74
  4. Step 4: Simplify right side
    139,356.38x = 26,464,893,187.20
  5. Step 5: Solve for x
    x = 26,464,893,187.20/139,356.38
  6. Step 6: Final answer
    x = 189,908.01

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.