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Finding the Fourth Proportional to 209,321.70, 313,885.35 and 90,932.10

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Solution

The fourth proportional to 209,321.70, 313,885.35 and 90,932.10 is: 136,355.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,321.70 : 313,885.35 = 90,932.10 : x
  2. Step 2: Convert to fraction form
    209,321.70/313,885.35 = 90,932.10/x
  3. Step 3: Cross multiply
    209,321.70x = 313,885.35 × 90,932.10
  4. Step 4: Simplify right side
    209,321.70x = 28,542,254,034.74
  5. Step 5: Solve for x
    x = 28,542,254,034.74/209,321.70
  6. Step 6: Final answer
    x = 136,355.93

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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.