Home / 209,111.36-313,490.70-90,693.50

Finding the Fourth Proportional to 209,111.36, 313,490.70 and 90,693.50

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Solution

The fourth proportional to 209,111.36, 313,490.70 and 90,693.50 is: 135,963.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,111.36 : 313,490.70 = 90,693.50 : x
  2. Step 2: Convert to fraction form
    209,111.36/313,490.70 = 90,693.50/x
  3. Step 3: Cross multiply
    209,111.36x = 313,490.70 × 90,693.50
  4. Step 4: Simplify right side
    209,111.36x = 28,431,569,584.18
  5. Step 5: Solve for x
    x = 28,431,569,584.18/209,111.36
  6. Step 6: Final answer
    x = 135,963.78

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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.