Home / 80,521.17-111,129.47-48,690.30

Finding the Fourth Proportional to 80,521.17, 111,129.47 and 48,690.30

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Solution

The fourth proportional to 80,521.17, 111,129.47 and 48,690.30 is: 67,198.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,521.17 : 111,129.47 = 48,690.30 : x
  2. Step 2: Convert to fraction form
    80,521.17/111,129.47 = 48,690.30/x
  3. Step 3: Cross multiply
    80,521.17x = 111,129.47 × 48,690.30
  4. Step 4: Simplify right side
    80,521.17x = 5,410,926,963.91
  5. Step 5: Solve for x
    x = 5,410,926,963.91/80,521.17
  6. Step 6: Final answer
    x = 67,198.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.