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Finding the Fourth Proportional to 139,468.61, 192,559.37 and 107,145.66

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Solution

The fourth proportional to 139,468.61, 192,559.37 and 107,145.66 is: 147,932.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,468.61 : 192,559.37 = 107,145.66 : x
  2. Step 2: Convert to fraction form
    139,468.61/192,559.37 = 107,145.66/x
  3. Step 3: Cross multiply
    139,468.61x = 192,559.37 × 107,145.66
  4. Step 4: Simplify right side
    139,468.61x = 20,631,900,252.11
  5. Step 5: Solve for x
    x = 20,631,900,252.11/139,468.61
  6. Step 6: Final answer
    x = 147,932.22

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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.