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Finding the Fourth Proportional to 139,369.61, 208,001.22 and 125,917.54

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Solution

The fourth proportional to 139,369.61, 208,001.22 and 125,917.54 is: 187,924.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,369.61 : 208,001.22 = 125,917.54 : x
  2. Step 2: Convert to fraction form
    139,369.61/208,001.22 = 125,917.54/x
  3. Step 3: Cross multiply
    139,369.61x = 208,001.22 × 125,917.54
  4. Step 4: Simplify right side
    139,369.61x = 26,191,000,947.21
  5. Step 5: Solve for x
    x = 26,191,000,947.21/139,369.61
  6. Step 6: Final answer
    x = 187,924.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.