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Finding the Fourth Proportional to 139,712.48, 192,803.24 and 76,050.71

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Solution

The fourth proportional to 139,712.48, 192,803.24 and 76,050.71 is: 104,949.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,712.48 : 192,803.24 = 76,050.71 : x
  2. Step 2: Convert to fraction form
    139,712.48/192,803.24 = 76,050.71/x
  3. Step 3: Cross multiply
    139,712.48x = 192,803.24 × 76,050.71
  4. Step 4: Simplify right side
    139,712.48x = 14,662,823,292.30
  5. Step 5: Solve for x
    x = 14,662,823,292.30/139,712.48
  6. Step 6: Final answer
    x = 104,949.99

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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.