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Finding the Fourth Proportional to 143,745.40, 215,618.13 and 43,900.21

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Solution

The fourth proportional to 143,745.40, 215,618.13 and 43,900.21 is: 65,850.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,745.40 : 215,618.13 = 43,900.21 : x
  2. Step 2: Convert to fraction form
    143,745.40/215,618.13 = 43,900.21/x
  3. Step 3: Cross multiply
    143,745.40x = 215,618.13 × 43,900.21
  4. Step 4: Simplify right side
    143,745.40x = 9,465,681,186.81
  5. Step 5: Solve for x
    x = 9,465,681,186.81/143,745.40
  6. Step 6: Final answer
    x = 65,850.32

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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.