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Finding the Fourth Proportional to 138,416.70, 207,279.44 and 91,415.10

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Solution

The fourth proportional to 138,416.70, 207,279.44 and 91,415.10 is: 136,894.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,416.70 : 207,279.44 = 91,415.10 : x
  2. Step 2: Convert to fraction form
    138,416.70/207,279.44 = 91,415.10/x
  3. Step 3: Cross multiply
    138,416.70x = 207,279.44 × 91,415.10
  4. Step 4: Simplify right side
    138,416.70x = 18,948,470,735.54
  5. Step 5: Solve for x
    x = 18,948,470,735.54/138,416.70
  6. Step 6: Final answer
    x = 136,894.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.