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Finding the Fourth Proportional to 49,872.60, 74,808.90 and 45,790.20

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Solution

The fourth proportional to 49,872.60, 74,808.90 and 45,790.20 is: 68,685.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,872.60 : 74,808.90 = 45,790.20 : x
  2. Step 2: Convert to fraction form
    49,872.60/74,808.90 = 45,790.20/x
  3. Step 3: Cross multiply
    49,872.60x = 74,808.90 × 45,790.20
  4. Step 4: Simplify right side
    49,872.60x = 3,425,514,492.78
  5. Step 5: Solve for x
    x = 3,425,514,492.78/49,872.60
  6. Step 6: Final answer
    x = 68,685.30

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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.