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Finding the Fourth Proportional to 139,370.28, 192,410.76 and 91,762

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Solution

The fourth proportional to 139,370.28, 192,410.76 and 91,762 is: 126,684.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,370.28 : 192,410.76 = 91,762 : x
  2. Step 2: Convert to fraction form
    139,370.28/192,410.76 = 91,762/x
  3. Step 3: Cross multiply
    139,370.28x = 192,410.76 × 91,762
  4. Step 4: Simplify right side
    139,370.28x = 17,655,996,159.12
  5. Step 5: Solve for x
    x = 17,655,996,159.12/139,370.28
  6. Step 6: Final answer
    x = 126,684.08

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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.