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Finding the Fourth Proportional to 72,710.66, 109,065.99 and 20,120.14

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Solution

The fourth proportional to 72,710.66, 109,065.99 and 20,120.14 is: 30,180.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,710.66 : 109,065.99 = 20,120.14 : x
  2. Step 2: Convert to fraction form
    72,710.66/109,065.99 = 20,120.14/x
  3. Step 3: Cross multiply
    72,710.66x = 109,065.99 × 20,120.14
  4. Step 4: Simplify right side
    72,710.66x = 2,194,422,887.44
  5. Step 5: Solve for x
    x = 2,194,422,887.44/72,710.66
  6. Step 6: Final answer
    x = 30,180.21

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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.