Home / 212,104.86-318,157.29-87,442.62

Finding the Fourth Proportional to 212,104.86, 318,157.29 and 87,442.62

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Solution

The fourth proportional to 212,104.86, 318,157.29 and 87,442.62 is: 131,163.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,104.86 : 318,157.29 = 87,442.62 : x
  2. Step 2: Convert to fraction form
    212,104.86/318,157.29 = 87,442.62/x
  3. Step 3: Cross multiply
    212,104.86x = 318,157.29 × 87,442.62
  4. Step 4: Simplify right side
    212,104.86x = 27,820,507,009.70
  5. Step 5: Solve for x
    x = 27,820,507,009.70/212,104.86
  6. Step 6: Final answer
    x = 131,163.93

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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.