Home / 120,103.79-165,719.63-72,359.75

Finding the Fourth Proportional to 120,103.79, 165,719.63 and 72,359.75

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Solution

The fourth proportional to 120,103.79, 165,719.63 and 72,359.75 is: 99,842.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,103.79 : 165,719.63 = 72,359.75 : x
  2. Step 2: Convert to fraction form
    120,103.79/165,719.63 = 72,359.75/x
  3. Step 3: Cross multiply
    120,103.79x = 165,719.63 × 72,359.75
  4. Step 4: Simplify right side
    120,103.79x = 11,991,429,806.50
  5. Step 5: Solve for x
    x = 11,991,429,806.50/120,103.79
  6. Step 6: Final answer
    x = 99,842.23

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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.