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Finding the Fourth Proportional to 80,963.40, 121,416.30 and 36,611.40

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Solution

The fourth proportional to 80,963.40, 121,416.30 and 36,611.40 is: 54,904.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,963.40 : 121,416.30 = 36,611.40 : x
  2. Step 2: Convert to fraction form
    80,963.40/121,416.30 = 36,611.40/x
  3. Step 3: Cross multiply
    80,963.40x = 121,416.30 × 36,611.40
  4. Step 4: Simplify right side
    80,963.40x = 4,445,220,725.82
  5. Step 5: Solve for x
    x = 4,445,220,725.82/80,963.40
  6. Step 6: Final answer
    x = 54,904.08

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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.