Home / 107,821.20-161,731.80-66,291.60

Finding the Fourth Proportional to 107,821.20, 161,731.80 and 66,291.60

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Solution

The fourth proportional to 107,821.20, 161,731.80 and 66,291.60 is: 99,437.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,821.20 : 161,731.80 = 66,291.60 : x
  2. Step 2: Convert to fraction form
    107,821.20/161,731.80 = 66,291.60/x
  3. Step 3: Cross multiply
    107,821.20x = 161,731.80 × 66,291.60
  4. Step 4: Simplify right side
    107,821.20x = 10,721,459,792.88
  5. Step 5: Solve for x
    x = 10,721,459,792.88/107,821.20
  6. Step 6: Final answer
    x = 99,437.40

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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.