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Finding the Fourth Proportional to 131,187.30, 181,124.01 and 100,916.79

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Solution

The fourth proportional to 131,187.30, 181,124.01 and 100,916.79 is: 139,330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,187.30 : 181,124.01 = 100,916.79 : x
  2. Step 2: Convert to fraction form
    131,187.30/181,124.01 = 100,916.79/x
  3. Step 3: Cross multiply
    131,187.30x = 181,124.01 × 100,916.79
  4. Step 4: Simplify right side
    131,187.30x = 18,278,453,681.13
  5. Step 5: Solve for x
    x = 18,278,453,681.13/131,187.30
  6. Step 6: Final answer
    x = 139,330.97

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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.