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Finding the Fourth Proportional to 103,329.60, 154,994.40 and 90,207.60

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Solution

The fourth proportional to 103,329.60, 154,994.40 and 90,207.60 is: 135,311.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,329.60 : 154,994.40 = 90,207.60 : x
  2. Step 2: Convert to fraction form
    103,329.60/154,994.40 = 90,207.60/x
  3. Step 3: Cross multiply
    103,329.60x = 154,994.40 × 90,207.60
  4. Step 4: Simplify right side
    103,329.60x = 13,981,672,837.44
  5. Step 5: Solve for x
    x = 13,981,672,837.44/103,329.60
  6. Step 6: Final answer
    x = 135,311.40

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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.