Home / 72,810.32-109,215.52-20,219.81

Finding the Fourth Proportional to 72,810.32, 109,215.52 and 20,219.81

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Solution

The fourth proportional to 72,810.32, 109,215.52 and 20,219.81 is: 30,329.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,810.32 : 109,215.52 = 20,219.81 : x
  2. Step 2: Convert to fraction form
    72,810.32/109,215.52 = 20,219.81/x
  3. Step 3: Cross multiply
    72,810.32x = 109,215.52 × 20,219.81
  4. Step 4: Simplify right side
    72,810.32x = 2,208,317,063.45
  5. Step 5: Solve for x
    x = 2,208,317,063.45/72,810.32
  6. Step 6: Final answer
    x = 30,329.73

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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.