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Finding the Fourth Proportional to 67,205.88, 100,801.62 and 20,459.16

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Solution

The fourth proportional to 67,205.88, 100,801.62 and 20,459.16 is: 30,686.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,205.88 : 100,801.62 = 20,459.16 : x
  2. Step 2: Convert to fraction form
    67,205.88/100,801.62 = 20,459.16/x
  3. Step 3: Cross multiply
    67,205.88x = 100,801.62 × 20,459.16
  4. Step 4: Simplify right side
    67,205.88x = 2,062,316,471.84
  5. Step 5: Solve for x
    x = 2,062,316,471.84/67,205.88
  6. Step 6: Final answer
    x = 30,686.55

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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.