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Finding the Fourth Proportional to 139,215.90, 208,690.57 and 44,393.82

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Solution

The fourth proportional to 139,215.90, 208,690.57 and 44,393.82 is: 66,548.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,215.90 : 208,690.57 = 44,393.82 : x
  2. Step 2: Convert to fraction form
    139,215.90/208,690.57 = 44,393.82/x
  3. Step 3: Cross multiply
    139,215.90x = 208,690.57 × 44,393.82
  4. Step 4: Simplify right side
    139,215.90x = 9,264,571,600.28
  5. Step 5: Solve for x
    x = 9,264,571,600.28/139,215.90
  6. Step 6: Final answer
    x = 66,548.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.