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Finding the Fourth Proportional to 245,611.54, 338,916.45 and 138,218.50

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Solution

The fourth proportional to 245,611.54, 338,916.45 and 138,218.50 is: 190,726.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,611.54 : 338,916.45 = 138,218.50 : x
  2. Step 2: Convert to fraction form
    245,611.54/338,916.45 = 138,218.50/x
  3. Step 3: Cross multiply
    245,611.54x = 338,916.45 × 138,218.50
  4. Step 4: Simplify right side
    245,611.54x = 46,844,523,344.33
  5. Step 5: Solve for x
    x = 46,844,523,344.33/245,611.54
  6. Step 6: Final answer
    x = 190,726.07

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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.