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Finding the Fourth Proportional to 245,902.28, 339,341.86 and 138,482.92

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Solution

The fourth proportional to 245,902.28, 339,341.86 and 138,482.92 is: 191,104.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,902.28 : 339,341.86 = 138,482.92 : x
  2. Step 2: Convert to fraction form
    245,902.28/339,341.86 = 138,482.92/x
  3. Step 3: Cross multiply
    245,902.28x = 339,341.86 × 138,482.92
  4. Step 4: Simplify right side
    245,902.28x = 46,993,051,651.03
  5. Step 5: Solve for x
    x = 46,993,051,651.03/245,902.28
  6. Step 6: Final answer
    x = 191,104.58

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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.