Home / 81,699.21-122,486.61-42,231.15

Finding the Fourth Proportional to 81,699.21, 122,486.61 and 42,231.15

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Solution

The fourth proportional to 81,699.21, 122,486.61 and 42,231.15 is: 63,314.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,699.21 : 122,486.61 = 42,231.15 : x
  2. Step 2: Convert to fraction form
    81,699.21/122,486.61 = 42,231.15/x
  3. Step 3: Cross multiply
    81,699.21x = 122,486.61 × 42,231.15
  4. Step 4: Simplify right side
    81,699.21x = 5,172,750,399.90
  5. Step 5: Solve for x
    x = 5,172,750,399.90/81,699.21
  6. Step 6: Final answer
    x = 63,314.57

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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.