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Finding the Fourth Proportional to 139,477.02, 192,472.08 and 79,044.12

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Solution

The fourth proportional to 139,477.02, 192,472.08 and 79,044.12 is: 109,077.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,477.02 : 192,472.08 = 79,044.12 : x
  2. Step 2: Convert to fraction form
    139,477.02/192,472.08 = 79,044.12/x
  3. Step 3: Cross multiply
    139,477.02x = 192,472.08 × 79,044.12
  4. Step 4: Simplify right side
    139,477.02x = 15,213,786,188.17
  5. Step 5: Solve for x
    x = 15,213,786,188.17/139,477.02
  6. Step 6: Final answer
    x = 109,077.37

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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.