Home / 80,779.79-121,167.95-21,615.45

Finding the Fourth Proportional to 80,779.79, 121,167.95 and 21,615.45

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Solution

The fourth proportional to 80,779.79, 121,167.95 and 21,615.45 is: 32,422.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,779.79 : 121,167.95 = 21,615.45 : x
  2. Step 2: Convert to fraction form
    80,779.79/121,167.95 = 21,615.45/x
  3. Step 3: Cross multiply
    80,779.79x = 121,167.95 × 21,615.45
  4. Step 4: Simplify right side
    80,779.79x = 2,619,099,656.75
  5. Step 5: Solve for x
    x = 2,619,099,656.75/80,779.79
  6. Step 6: Final answer
    x = 32,422.71

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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.