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Finding the Fourth Proportional to 45,915.80, 68,727.90 and 42,416.60

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Solution

The fourth proportional to 45,915.80, 68,727.90 and 42,416.60 is: 63,490.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,915.80 : 68,727.90 = 42,416.60 : x
  2. Step 2: Convert to fraction form
    45,915.80/68,727.90 = 42,416.60/x
  3. Step 3: Cross multiply
    45,915.80x = 68,727.90 × 42,416.60
  4. Step 4: Simplify right side
    45,915.80x = 2,915,203,843.14
  5. Step 5: Solve for x
    x = 2,915,203,843.14/45,915.80
  6. Step 6: Final answer
    x = 63,490.21

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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.