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Finding the Fourth Proportional to 245,641.41, 338,981.22 and 138,211.38

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Solution

The fourth proportional to 245,641.41, 338,981.22 and 138,211.38 is: 190,729.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,641.41 : 338,981.22 = 138,211.38 : x
  2. Step 2: Convert to fraction form
    245,641.41/338,981.22 = 138,211.38/x
  3. Step 3: Cross multiply
    245,641.41x = 338,981.22 × 138,211.38
  4. Step 4: Simplify right side
    245,641.41x = 46,851,062,210.28
  5. Step 5: Solve for x
    x = 46,851,062,210.28/245,641.41
  6. Step 6: Final answer
    x = 190,729.50

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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.