Home / 209,154.12-313,780.40-68,912.76

Finding the Fourth Proportional to 209,154.12, 313,780.40 and 68,912.76

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Solution

The fourth proportional to 209,154.12, 313,780.40 and 68,912.76 is: 103,385.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,154.12 : 313,780.40 = 68,912.76 : x
  2. Step 2: Convert to fraction form
    209,154.12/313,780.40 = 68,912.76/x
  3. Step 3: Cross multiply
    209,154.12x = 313,780.40 × 68,912.76
  4. Step 4: Simplify right side
    209,154.12x = 21,623,473,397.90
  5. Step 5: Solve for x
    x = 21,623,473,397.90/209,154.12
  6. Step 6: Final answer
    x = 103,385.36

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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.