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Finding the Fourth Proportional to 180,115.25, 270,166.72 and 85,390.81

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Solution

The fourth proportional to 180,115.25, 270,166.72 and 85,390.81 is: 128,083.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,115.25 : 270,166.72 = 85,390.81 : x
  2. Step 2: Convert to fraction form
    180,115.25/270,166.72 = 85,390.81/x
  3. Step 3: Cross multiply
    180,115.25x = 270,166.72 × 85,390.81
  4. Step 4: Simplify right side
    180,115.25x = 23,069,754,086.90
  5. Step 5: Solve for x
    x = 23,069,754,086.90/180,115.25
  6. Step 6: Final answer
    x = 128,083.30

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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.