Home / 107,840.60-161,760.90-81,402.20

Finding the Fourth Proportional to 107,840.60, 161,760.90 and 81,402.20

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Solution

The fourth proportional to 107,840.60, 161,760.90 and 81,402.20 is: 122,103.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,840.60 : 161,760.90 = 81,402.20 : x
  2. Step 2: Convert to fraction form
    107,840.60/161,760.90 = 81,402.20/x
  3. Step 3: Cross multiply
    107,840.60x = 161,760.90 × 81,402.20
  4. Step 4: Simplify right side
    107,840.60x = 13,167,693,133.98
  5. Step 5: Solve for x
    x = 13,167,693,133.98/107,840.60
  6. Step 6: Final answer
    x = 122,103.30

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1.5x scale

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.