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Finding the Fourth Proportional to 138,570.52, 191,227.61 and 74,908.32

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Solution

The fourth proportional to 138,570.52, 191,227.61 and 74,908.32 is: 103,373.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,570.52 : 191,227.61 = 74,908.32 : x
  2. Step 2: Convert to fraction form
    138,570.52/191,227.61 = 74,908.32/x
  3. Step 3: Cross multiply
    138,570.52x = 191,227.61 × 74,908.32
  4. Step 4: Simplify right side
    138,570.52x = 14,324,538,800.03
  5. Step 5: Solve for x
    x = 14,324,538,800.03/138,570.52
  6. Step 6: Final answer
    x = 103,373.64

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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.