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Finding the Fourth Proportional to 143,685.80, 215,515.40 and 67,766.92

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Solution

The fourth proportional to 143,685.80, 215,515.40 and 67,766.92 is: 101,644.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,685.80 : 215,515.40 = 67,766.92 : x
  2. Step 2: Convert to fraction form
    143,685.80/215,515.40 = 67,766.92/x
  3. Step 3: Cross multiply
    143,685.80x = 215,515.40 × 67,766.92
  4. Step 4: Simplify right side
    143,685.80x = 14,604,814,870.57
  5. Step 5: Solve for x
    x = 14,604,814,870.57/143,685.80
  6. Step 6: Final answer
    x = 101,644.11

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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.