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Finding the Fourth Proportional to 85,480.11, 128,220.17 and 23,155.47

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Solution

The fourth proportional to 85,480.11, 128,220.17 and 23,155.47 is: 34,733.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,480.11 : 128,220.17 = 23,155.47 : x
  2. Step 2: Convert to fraction form
    85,480.11/128,220.17 = 23,155.47/x
  3. Step 3: Cross multiply
    85,480.11x = 128,220.17 × 23,155.47
  4. Step 4: Simplify right side
    85,480.11x = 2,968,998,184.05
  5. Step 5: Solve for x
    x = 2,968,998,184.05/85,480.11
  6. Step 6: Final answer
    x = 34,733.21

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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.