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Finding the Fourth Proportional to 209,281.90, 313,915.82 and 90,953.26

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Solution

The fourth proportional to 209,281.90, 313,915.82 and 90,953.26 is: 136,426.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,281.90 : 313,915.82 = 90,953.26 : x
  2. Step 2: Convert to fraction form
    209,281.90/313,915.82 = 90,953.26/x
  3. Step 3: Cross multiply
    209,281.90x = 313,915.82 × 90,953.26
  4. Step 4: Simplify right side
    209,281.90x = 28,551,667,194.57
  5. Step 5: Solve for x
    x = 28,551,667,194.57/209,281.90
  6. Step 6: Final answer
    x = 136,426.83

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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.