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Finding the Fourth Proportional to 45,612.80, 68,419.20 and 29,866.40

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Solution

The fourth proportional to 45,612.80, 68,419.20 and 29,866.40 is: 44,799.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,612.80 : 68,419.20 = 29,866.40 : x
  2. Step 2: Convert to fraction form
    45,612.80/68,419.20 = 29,866.40/x
  3. Step 3: Cross multiply
    45,612.80x = 68,419.20 × 29,866.40
  4. Step 4: Simplify right side
    45,612.80x = 2,043,435,194.88
  5. Step 5: Solve for x
    x = 2,043,435,194.88/45,612.80
  6. Step 6: Final answer
    x = 44,799.60

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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.