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Finding the Fourth Proportional to 245,338.80, 338,603.40 and 137,917.68

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Solution

The fourth proportional to 245,338.80, 338,603.40 and 137,917.68 is: 190,346.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,338.80 : 338,603.40 = 137,917.68 : x
  2. Step 2: Convert to fraction form
    245,338.80/338,603.40 = 137,917.68/x
  3. Step 3: Cross multiply
    245,338.80x = 338,603.40 × 137,917.68
  4. Step 4: Simplify right side
    245,338.80x = 46,699,395,368.11
  5. Step 5: Solve for x
    x = 46,699,395,368.11/245,338.80
  6. Step 6: Final answer
    x = 190,346.55

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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.