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Finding the Fourth Proportional to 67,099.88, 100,664.58 and 20,356.40

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Solution

The fourth proportional to 67,099.88, 100,664.58 and 20,356.40 is: 30,539.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,099.88 : 100,664.58 = 20,356.40 : x
  2. Step 2: Convert to fraction form
    67,099.88/100,664.58 = 20,356.40/x
  3. Step 3: Cross multiply
    67,099.88x = 100,664.58 × 20,356.40
  4. Step 4: Simplify right side
    67,099.88x = 2,049,168,456.31
  5. Step 5: Solve for x
    x = 2,049,168,456.31/67,099.88
  6. Step 6: Final answer
    x = 30,539.08

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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.