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Finding the Fourth Proportional to 139,236.47, 192,130.35 and 77,974.11

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Solution

The fourth proportional to 139,236.47, 192,130.35 and 77,974.11 is: 107,595.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,236.47 : 192,130.35 = 77,974.11 : x
  2. Step 2: Convert to fraction form
    139,236.47/192,130.35 = 77,974.11/x
  3. Step 3: Cross multiply
    139,236.47x = 192,130.35 × 77,974.11
  4. Step 4: Simplify right side
    139,236.47x = 14,981,192,752.84
  5. Step 5: Solve for x
    x = 14,981,192,752.84/139,236.47
  6. Step 6: Final answer
    x = 107,595.32

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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.