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Finding the Fourth Proportional to 245,073.80, 338,203.19 and 137,643.84

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Solution

The fourth proportional to 245,073.80, 338,203.19 and 137,643.84 is: 189,949.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,073.80 : 338,203.19 = 137,643.84 : x
  2. Step 2: Convert to fraction form
    245,073.80/338,203.19 = 137,643.84/x
  3. Step 3: Cross multiply
    245,073.80x = 338,203.19 × 137,643.84
  4. Step 4: Simplify right side
    245,073.80x = 46,551,584,434.75
  5. Step 5: Solve for x
    x = 46,551,584,434.75/245,073.80
  6. Step 6: Final answer
    x = 189,949.25

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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.