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Finding the Fourth Proportional to 72,803.34, 109,206.90 and 20,212.74

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Solution

The fourth proportional to 72,803.34, 109,206.90 and 20,212.74 is: 30,319.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,803.34 : 109,206.90 = 20,212.74 : x
  2. Step 2: Convert to fraction form
    72,803.34/109,206.90 = 20,212.74/x
  3. Step 3: Cross multiply
    72,803.34x = 109,206.90 × 20,212.74
  4. Step 4: Simplify right side
    72,803.34x = 2,207,370,675.91
  5. Step 5: Solve for x
    x = 2,207,370,675.91/72,803.34
  6. Step 6: Final answer
    x = 30,319.63

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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.