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Finding the Fourth Proportional to 245,679.16, 339,011.10 and 138,247.32

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Solution

The fourth proportional to 245,679.16, 339,011.10 and 138,247.32 is: 190,766.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,679.16 : 339,011.10 = 138,247.32 : x
  2. Step 2: Convert to fraction form
    245,679.16/339,011.10 = 138,247.32/x
  3. Step 3: Cross multiply
    245,679.16x = 339,011.10 × 138,247.32
  4. Step 4: Simplify right side
    245,679.16x = 46,867,376,025.25
  5. Step 5: Solve for x
    x = 46,867,376,025.25/245,679.16
  6. Step 6: Final answer
    x = 190,766.59

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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.