Home / 72,712.76-109,071.58-20,117.84

Finding the Fourth Proportional to 72,712.76, 109,071.58 and 20,117.84

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Solution

The fourth proportional to 72,712.76, 109,071.58 and 20,117.84 is: 30,177.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,712.76 : 109,071.58 = 20,117.84 : x
  2. Step 2: Convert to fraction form
    72,712.76/109,071.58 = 20,117.84/x
  3. Step 3: Cross multiply
    72,712.76x = 109,071.58 × 20,117.84
  4. Step 4: Simplify right side
    72,712.76x = 2,194,284,594.99
  5. Step 5: Solve for x
    x = 2,194,284,594.99/72,712.76
  6. Step 6: Final answer
    x = 30,177.44

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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.