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Finding the Fourth Proportional to 138,604.48, 191,274.06 and 74,942.13

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Solution

The fourth proportional to 138,604.48, 191,274.06 and 74,942.13 is: 103,420.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,604.48 : 191,274.06 = 74,942.13 : x
  2. Step 2: Convert to fraction form
    138,604.48/191,274.06 = 74,942.13/x
  3. Step 3: Cross multiply
    138,604.48x = 191,274.06 × 74,942.13
  4. Step 4: Simplify right side
    138,604.48x = 14,334,485,470.15
  5. Step 5: Solve for x
    x = 14,334,485,470.15/138,604.48
  6. Step 6: Final answer
    x = 103,420.07

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1.5x scale

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.