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Finding the Fourth Proportional to 247,012.32, 340,872.48 and 139,579.98

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Solution

The fourth proportional to 247,012.32, 340,872.48 and 139,579.98 is: 192,617.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,012.32 : 340,872.48 = 139,579.98 : x
  2. Step 2: Convert to fraction form
    247,012.32/340,872.48 = 139,579.98/x
  3. Step 3: Cross multiply
    247,012.32x = 340,872.48 × 139,579.98
  4. Step 4: Simplify right side
    247,012.32x = 47,578,973,940.95
  5. Step 5: Solve for x
    x = 47,578,973,940.95/247,012.32
  6. Step 6: Final answer
    x = 192,617.82

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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.