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Finding the Fourth Proportional to 245,758.53, 339,146.69 and 138,329.13

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Solution

The fourth proportional to 245,758.53, 339,146.69 and 138,329.13 is: 190,894.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,758.53 : 339,146.69 = 138,329.13 : x
  2. Step 2: Convert to fraction form
    245,758.53/339,146.69 = 138,329.13/x
  3. Step 3: Cross multiply
    245,758.53x = 339,146.69 × 138,329.13
  4. Step 4: Simplify right side
    245,758.53x = 46,913,866,570.08
  5. Step 5: Solve for x
    x = 46,913,866,570.08/245,758.53
  6. Step 6: Final answer
    x = 190,894.15

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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.