Home / 81,168.25-121,779.71-51,147.62

Finding the Fourth Proportional to 81,168.25, 121,779.71 and 51,147.62

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Solution

The fourth proportional to 81,168.25, 121,779.71 and 51,147.62 is: 76,738.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,168.25 : 121,779.71 = 51,147.62 : x
  2. Step 2: Convert to fraction form
    81,168.25/121,779.71 = 51,147.62/x
  3. Step 3: Cross multiply
    81,168.25x = 121,779.71 × 51,147.62
  4. Step 4: Simplify right side
    81,168.25x = 6,228,742,330.79
  5. Step 5: Solve for x
    x = 6,228,742,330.79/81,168.25
  6. Step 6: Final answer
    x = 76,738.65

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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.