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Finding the Fourth Proportional to 45,781.60, 68,672.40 and 28,285.60

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Solution

The fourth proportional to 45,781.60, 68,672.40 and 28,285.60 is: 42,428.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,781.60 : 68,672.40 = 28,285.60 : x
  2. Step 2: Convert to fraction form
    45,781.60/68,672.40 = 28,285.60/x
  3. Step 3: Cross multiply
    45,781.60x = 68,672.40 × 28,285.60
  4. Step 4: Simplify right side
    45,781.60x = 1,942,440,037.44
  5. Step 5: Solve for x
    x = 1,942,440,037.44/45,781.60
  6. Step 6: Final answer
    x = 42,428.40

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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.