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Finding the Fourth Proportional to 139,480.77, 192,492.41 and 78,232.71

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Solution

The fourth proportional to 139,480.77, 192,492.41 and 78,232.71 is: 107,966.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,480.77 : 192,492.41 = 78,232.71 : x
  2. Step 2: Convert to fraction form
    139,480.77/192,492.41 = 78,232.71/x
  3. Step 3: Cross multiply
    139,480.77x = 192,492.41 × 78,232.71
  4. Step 4: Simplify right side
    139,480.77x = 15,059,202,497.57
  5. Step 5: Solve for x
    x = 15,059,202,497.57/139,480.77
  6. Step 6: Final answer
    x = 107,966.16

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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.