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Finding the Fourth Proportional to 80,002.70, 120,004.05 and 78,836.30

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Solution

The fourth proportional to 80,002.70, 120,004.05 and 78,836.30 is: 118,254.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,002.70 : 120,004.05 = 78,836.30 : x
  2. Step 2: Convert to fraction form
    80,002.70/120,004.05 = 78,836.30/x
  3. Step 3: Cross multiply
    80,002.70x = 120,004.05 × 78,836.30
  4. Step 4: Simplify right side
    80,002.70x = 9,460,675,287.02
  5. Step 5: Solve for x
    x = 9,460,675,287.02/80,002.70
  6. Step 6: Final answer
    x = 118,254.45

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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.