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Finding the Fourth Proportional to 109,740.80, 164,611.20 and 75,915.20

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Solution

The fourth proportional to 109,740.80, 164,611.20 and 75,915.20 is: 113,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,740.80 : 164,611.20 = 75,915.20 : x
  2. Step 2: Convert to fraction form
    109,740.80/164,611.20 = 75,915.20/x
  3. Step 3: Cross multiply
    109,740.80x = 164,611.20 × 75,915.20
  4. Step 4: Simplify right side
    109,740.80x = 12,496,492,170.24
  5. Step 5: Solve for x
    x = 12,496,492,170.24/109,740.80
  6. Step 6: Final answer
    x = 113,872.80

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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.