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Finding the Fourth Proportional to 245,466.77, 338,742 and 138,034.51

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Solution

The fourth proportional to 245,466.77, 338,742 and 138,034.51 is: 190,486.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,466.77 : 338,742 = 138,034.51 : x
  2. Step 2: Convert to fraction form
    245,466.77/338,742 = 138,034.51/x
  3. Step 3: Cross multiply
    245,466.77x = 338,742 × 138,034.51
  4. Step 4: Simplify right side
    245,466.77x = 46,758,085,139.57
  5. Step 5: Solve for x
    x = 46,758,085,139.57/245,466.77
  6. Step 6: Final answer
    x = 190,486.42

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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.