Home / 81,421.10-122,127.60-41,982.20

Finding the Fourth Proportional to 81,421.10, 122,127.60 and 41,982.20

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Solution

The fourth proportional to 81,421.10, 122,127.60 and 41,982.20 is: 62,971.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,421.10 : 122,127.60 = 41,982.20 : x
  2. Step 2: Convert to fraction form
    81,421.10/122,127.60 = 41,982.20/x
  3. Step 3: Cross multiply
    81,421.10x = 122,127.60 × 41,982.20
  4. Step 4: Simplify right side
    81,421.10x = 5,127,185,328.72
  5. Step 5: Solve for x
    x = 5,127,185,328.72/81,421.10
  6. Step 6: Final answer
    x = 62,971.21

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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.