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Finding the Fourth Proportional to 67,611.40, 101,426.70 and 20,859.40

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Solution

The fourth proportional to 67,611.40, 101,426.70 and 20,859.40 is: 31,292.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,611.40 : 101,426.70 = 20,859.40 : x
  2. Step 2: Convert to fraction form
    67,611.40/101,426.70 = 20,859.40/x
  3. Step 3: Cross multiply
    67,611.40x = 101,426.70 × 20,859.40
  4. Step 4: Simplify right side
    67,611.40x = 2,115,700,105.98
  5. Step 5: Solve for x
    x = 2,115,700,105.98/67,611.40
  6. Step 6: Final answer
    x = 31,292.06

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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.