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Finding the Fourth Proportional to 251,299.49, 346,794.41 and 138,129.53

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Solution

The fourth proportional to 251,299.49, 346,794.41 and 138,129.53 is: 190,619.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,299.49 : 346,794.41 = 138,129.53 : x
  2. Step 2: Convert to fraction form
    251,299.49/346,794.41 = 138,129.53/x
  3. Step 3: Cross multiply
    251,299.49x = 346,794.41 × 138,129.53
  4. Step 4: Simplify right side
    251,299.49x = 47,902,547,471.28
  5. Step 5: Solve for x
    x = 47,902,547,471.28/251,299.49
  6. Step 6: Final answer
    x = 190,619.36

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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.