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Finding the Fourth Proportional to 85,480.40, 128,220.60 and 23,150.90

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Solution

The fourth proportional to 85,480.40, 128,220.60 and 23,150.90 is: 34,726.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,480.40 : 128,220.60 = 23,150.90 : x
  2. Step 2: Convert to fraction form
    85,480.40/128,220.60 = 23,150.90/x
  3. Step 3: Cross multiply
    85,480.40x = 128,220.60 × 23,150.90
  4. Step 4: Simplify right side
    85,480.40x = 2,968,422,288.54
  5. Step 5: Solve for x
    x = 2,968,422,288.54/85,480.40
  6. Step 6: Final answer
    x = 34,726.35

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Similar ratio
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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.