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Finding the Fourth Proportional to 171,087.40, 256,922.70 and 121,515.40

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Solution

The fourth proportional to 171,087.40, 256,922.70 and 121,515.40 is: 182,480.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,087.40 : 256,922.70 = 121,515.40 : x
  2. Step 2: Convert to fraction form
    171,087.40/256,922.70 = 121,515.40/x
  3. Step 3: Cross multiply
    171,087.40x = 256,922.70 × 121,515.40
  4. Step 4: Simplify right side
    171,087.40x = 31,220,064,659.58
  5. Step 5: Solve for x
    x = 31,220,064,659.58/171,087.40
  6. Step 6: Final answer
    x = 182,480.21

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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.