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Finding the Fourth Proportional to 139,383.16, 192,344.54 and 75,720.80

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Solution

The fourth proportional to 139,383.16, 192,344.54 and 75,720.80 is: 104,492.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,383.16 : 192,344.54 = 75,720.80 : x
  2. Step 2: Convert to fraction form
    139,383.16/192,344.54 = 75,720.80/x
  3. Step 3: Cross multiply
    139,383.16x = 192,344.54 × 75,720.80
  4. Step 4: Simplify right side
    139,383.16x = 14,564,482,444.43
  5. Step 5: Solve for x
    x = 14,564,482,444.43/139,383.16
  6. Step 6: Final answer
    x = 104,492.41

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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.