Home / 143,442.60-214,939-90,740.76

Finding the Fourth Proportional to 143,442.60, 214,939 and 90,740.76

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Solution

The fourth proportional to 143,442.60, 214,939 and 90,740.76 is: 135,968.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,442.60 : 214,939 = 90,740.76 : x
  2. Step 2: Convert to fraction form
    143,442.60/214,939 = 90,740.76/x
  3. Step 3: Cross multiply
    143,442.60x = 214,939 × 90,740.76
  4. Step 4: Simplify right side
    143,442.60x = 19,503,728,213.64
  5. Step 5: Solve for x
    x = 19,503,728,213.64/143,442.60
  6. Step 6: Final answer
    x = 135,968.87

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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.