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Finding the Fourth Proportional to 139,521.82, 192,539.13 and 75,859.66

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Solution

The fourth proportional to 139,521.82, 192,539.13 and 75,859.66 is: 104,685.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,521.82 : 192,539.13 = 75,859.66 : x
  2. Step 2: Convert to fraction form
    139,521.82/192,539.13 = 75,859.66/x
  3. Step 3: Cross multiply
    139,521.82x = 192,539.13 × 75,859.66
  4. Step 4: Simplify right side
    139,521.82x = 14,605,952,938.50
  5. Step 5: Solve for x
    x = 14,605,952,938.50/139,521.82
  6. Step 6: Final answer
    x = 104,685.80

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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.