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Finding the Fourth Proportional to 139,341.16, 192,370.53 and 91,732.90

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Solution

The fourth proportional to 139,341.16, 192,370.53 and 91,732.90 is: 126,643.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,341.16 : 192,370.53 = 91,732.90 : x
  2. Step 2: Convert to fraction form
    139,341.16/192,370.53 = 91,732.90/x
  3. Step 3: Cross multiply
    139,341.16x = 192,370.53 × 91,732.90
  4. Step 4: Simplify right side
    139,341.16x = 17,646,706,591.44
  5. Step 5: Solve for x
    x = 17,646,706,591.44/139,341.16
  6. Step 6: Final answer
    x = 126,643.89

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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.