Home / 107,582.80-161,374.20-90,216.40

Finding the Fourth Proportional to 107,582.80, 161,374.20 and 90,216.40

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Solution

The fourth proportional to 107,582.80, 161,374.20 and 90,216.40 is: 135,324.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,582.80 : 161,374.20 = 90,216.40 : x
  2. Step 2: Convert to fraction form
    107,582.80/161,374.20 = 90,216.40/x
  3. Step 3: Cross multiply
    107,582.80x = 161,374.20 × 90,216.40
  4. Step 4: Simplify right side
    107,582.80x = 14,558,599,376.88
  5. Step 5: Solve for x
    x = 14,558,599,376.88/107,582.80
  6. Step 6: Final answer
    x = 135,324.60

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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.