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Finding the Fourth Proportional to 245,758.29, 339,146.34 and 138,328.89

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Solution

The fourth proportional to 245,758.29, 339,146.34 and 138,328.89 is: 190,893.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,758.29 : 339,146.34 = 138,328.89 : x
  2. Step 2: Convert to fraction form
    245,758.29/339,146.34 = 138,328.89/x
  3. Step 3: Cross multiply
    245,758.29x = 339,146.34 × 138,328.89
  4. Step 4: Simplify right side
    245,758.29x = 46,913,736,759.76
  5. Step 5: Solve for x
    x = 46,913,736,759.76/245,758.29
  6. Step 6: Final answer
    x = 190,893.81

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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.