Home / 72,711.36-109,070.28-20,119.68

Finding the Fourth Proportional to 72,711.36, 109,070.28 and 20,119.68

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Solution

The fourth proportional to 72,711.36, 109,070.28 and 20,119.68 is: 30,180.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,711.36 : 109,070.28 = 20,119.68 : x
  2. Step 2: Convert to fraction form
    72,711.36/109,070.28 = 20,119.68/x
  3. Step 3: Cross multiply
    72,711.36x = 109,070.28 × 20,119.68
  4. Step 4: Simplify right side
    72,711.36x = 2,194,459,131.11
  5. Step 5: Solve for x
    x = 2,194,459,131.11/72,711.36
  6. Step 6: Final answer
    x = 30,180.42

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1.5x scale

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.