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Finding the Fourth Proportional to 72,996.80, 109,538.40 and 48,108.80

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Solution

The fourth proportional to 72,996.80, 109,538.40 and 48,108.80 is: 72,191.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,996.80 : 109,538.40 = 48,108.80 : x
  2. Step 2: Convert to fraction form
    72,996.80/109,538.40 = 48,108.80/x
  3. Step 3: Cross multiply
    72,996.80x = 109,538.40 × 48,108.80
  4. Step 4: Simplify right side
    72,996.80x = 5,269,760,977.92
  5. Step 5: Solve for x
    x = 5,269,760,977.92/72,996.80
  6. Step 6: Final answer
    x = 72,191.67

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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.