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Finding the Fourth Proportional to 170,807.74, 256,367.09 and 90,912.78

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Solution

The fourth proportional to 170,807.74, 256,367.09 and 90,912.78 is: 136,451.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,807.74 : 256,367.09 = 90,912.78 : x
  2. Step 2: Convert to fraction form
    170,807.74/256,367.09 = 90,912.78/x
  3. Step 3: Cross multiply
    170,807.74x = 256,367.09 × 90,912.78
  4. Step 4: Simplify right side
    170,807.74x = 23,307,044,852.41
  5. Step 5: Solve for x
    x = 23,307,044,852.41/170,807.74
  6. Step 6: Final answer
    x = 136,451.92

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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.