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Finding the Fourth Proportional to 138,401.91, 191,025.68 and 90,627.44

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Solution

The fourth proportional to 138,401.91, 191,025.68 and 90,627.44 is: 125,086.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,401.91 : 191,025.68 = 90,627.44 : x
  2. Step 2: Convert to fraction form
    138,401.91/191,025.68 = 90,627.44/x
  3. Step 3: Cross multiply
    138,401.91x = 191,025.68 × 90,627.44
  4. Step 4: Simplify right side
    138,401.91x = 17,312,166,944.39
  5. Step 5: Solve for x
    x = 17,312,166,944.39/138,401.91
  6. Step 6: Final answer
    x = 125,086.19

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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.