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Finding the Fourth Proportional to 139,534.84, 192,557.64 and 75,872.80

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Solution

The fourth proportional to 139,534.84, 192,557.64 and 75,872.80 is: 104,704.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,534.84 : 192,557.64 = 75,872.80 : x
  2. Step 2: Convert to fraction form
    139,534.84/192,557.64 = 75,872.80/x
  3. Step 3: Cross multiply
    139,534.84x = 192,557.64 × 75,872.80
  4. Step 4: Simplify right side
    139,534.84x = 14,609,887,308.19
  5. Step 5: Solve for x
    x = 14,609,887,308.19/139,534.84
  6. Step 6: Final answer
    x = 104,704.23

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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.