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Finding the Fourth Proportional to 135,997.34, 202,629.12 and 128,357.72

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Solution

The fourth proportional to 135,997.34, 202,629.12 and 128,357.72 is: 191,246.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,997.34 : 202,629.12 = 128,357.72 : x
  2. Step 2: Convert to fraction form
    135,997.34/202,629.12 = 128,357.72/x
  3. Step 3: Cross multiply
    135,997.34x = 202,629.12 × 128,357.72
  4. Step 4: Simplify right side
    135,997.34x = 26,009,011,595.52
  5. Step 5: Solve for x
    x = 26,009,011,595.52/135,997.34
  6. Step 6: Final answer
    x = 191,246.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.