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Finding the Fourth Proportional to 170,806.74, 256,365.59 and 90,911.78

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Solution

The fourth proportional to 170,806.74, 256,365.59 and 90,911.78 is: 136,450.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,806.74 : 256,365.59 = 90,911.78 : x
  2. Step 2: Convert to fraction form
    170,806.74/256,365.59 = 90,911.78/x
  3. Step 3: Cross multiply
    170,806.74x = 256,365.59 × 90,911.78
  4. Step 4: Simplify right side
    170,806.74x = 23,306,653,296.07
  5. Step 5: Solve for x
    x = 23,306,653,296.07/170,806.74
  6. Step 6: Final answer
    x = 136,450.43

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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.