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Finding the Fourth Proportional to 80,017.99, 120,027.03 and 20,853.51

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Solution

The fourth proportional to 80,017.99, 120,027.03 and 20,853.51 is: 31,280.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,017.99 : 120,027.03 = 20,853.51 : x
  2. Step 2: Convert to fraction form
    80,017.99/120,027.03 = 20,853.51/x
  3. Step 3: Cross multiply
    80,017.99x = 120,027.03 × 20,853.51
  4. Step 4: Simplify right side
    80,017.99x = 2,502,984,870.38
  5. Step 5: Solve for x
    x = 2,502,984,870.38/80,017.99
  6. Step 6: Final answer
    x = 31,280.28

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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.