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Finding the Fourth Proportional to 245,511.32, 338,766.56 and 138,060.58

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Solution

The fourth proportional to 245,511.32, 338,766.56 and 138,060.58 is: 190,501.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,511.32 : 338,766.56 = 138,060.58 : x
  2. Step 2: Convert to fraction form
    245,511.32/338,766.56 = 138,060.58/x
  3. Step 3: Cross multiply
    245,511.32x = 338,766.56 × 138,060.58
  4. Step 4: Simplify right side
    245,511.32x = 46,770,307,758.20
  5. Step 5: Solve for x
    x = 46,770,307,758.20/245,511.32
  6. Step 6: Final answer
    x = 190,501.63

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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.