Home / 120,155.19-165,812.43-66,439.02

Finding the Fourth Proportional to 120,155.19, 165,812.43 and 66,439.02

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Solution

The fourth proportional to 120,155.19, 165,812.43 and 66,439.02 is: 91,684.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,155.19 : 165,812.43 = 66,439.02 : x
  2. Step 2: Convert to fraction form
    120,155.19/165,812.43 = 66,439.02/x
  3. Step 3: Cross multiply
    120,155.19x = 165,812.43 × 66,439.02
  4. Step 4: Simplify right side
    120,155.19x = 11,016,415,353.02
  5. Step 5: Solve for x
    x = 11,016,415,353.02/120,155.19
  6. Step 6: Final answer
    x = 91,684.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.