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Finding the Fourth Proportional to 209,275.71, 313,906.62 and 90,947.17

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Solution

The fourth proportional to 209,275.71, 313,906.62 and 90,947.17 is: 136,417.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,275.71 : 313,906.62 = 90,947.17 : x
  2. Step 2: Convert to fraction form
    209,275.71/313,906.62 = 90,947.17/x
  3. Step 3: Cross multiply
    209,275.71x = 313,906.62 × 90,947.17
  4. Step 4: Simplify right side
    209,275.71x = 28,548,918,733.27
  5. Step 5: Solve for x
    x = 28,548,918,733.27/209,275.71
  6. Step 6: Final answer
    x = 136,417.74

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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.