Home / 72,810.20-109,215.34-20,219.68

Finding the Fourth Proportional to 72,810.20, 109,215.34 and 20,219.68

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Solution

The fourth proportional to 72,810.20, 109,215.34 and 20,219.68 is: 30,329.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,810.20 : 109,215.34 = 20,219.68 : x
  2. Step 2: Convert to fraction form
    72,810.20/109,215.34 = 20,219.68/x
  3. Step 3: Cross multiply
    72,810.20x = 109,215.34 × 20,219.68
  4. Step 4: Simplify right side
    72,810.20x = 2,208,299,225.89
  5. Step 5: Solve for x
    x = 2,208,299,225.89/72,810.20
  6. Step 6: Final answer
    x = 30,329.53

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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.