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Finding the Fourth Proportional to 138,309.52, 190,870.92 and 84,593.56

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Solution

The fourth proportional to 138,309.52, 190,870.92 and 84,593.56 is: 116,741.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,309.52 : 190,870.92 = 84,593.56 : x
  2. Step 2: Convert to fraction form
    138,309.52/190,870.92 = 84,593.56/x
  3. Step 3: Cross multiply
    138,309.52x = 190,870.92 × 84,593.56
  4. Step 4: Simplify right side
    138,309.52x = 16,146,450,623.28
  5. Step 5: Solve for x
    x = 16,146,450,623.28/138,309.52
  6. Step 6: Final answer
    x = 116,741.43

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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.