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Finding the Fourth Proportional to 139,625.74, 192,799.86 and 129,495.16

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Solution

The fourth proportional to 139,625.74, 192,799.86 and 129,495.16 is: 178,811.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,625.74 : 192,799.86 = 129,495.16 : x
  2. Step 2: Convert to fraction form
    139,625.74/192,799.86 = 129,495.16/x
  3. Step 3: Cross multiply
    139,625.74x = 192,799.86 × 129,495.16
  4. Step 4: Simplify right side
    139,625.74x = 24,966,648,718.68
  5. Step 5: Solve for x
    x = 24,966,648,718.68/139,625.74
  6. Step 6: Final answer
    x = 178,811.22

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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.