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Finding the Fourth Proportional to 80,430.80, 120,660.60 and 33,688.40

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Solution

The fourth proportional to 80,430.80, 120,660.60 and 33,688.40 is: 50,538.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,430.80 : 120,660.60 = 33,688.40 : x
  2. Step 2: Convert to fraction form
    80,430.80/120,660.60 = 33,688.40/x
  3. Step 3: Cross multiply
    80,430.80x = 120,660.60 × 33,688.40
  4. Step 4: Simplify right side
    80,430.80x = 4,064,862,557.04
  5. Step 5: Solve for x
    x = 4,064,862,557.04/80,430.80
  6. Step 6: Final answer
    x = 50,538.63

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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.