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Finding the Fourth Proportional to 56,906.80, 85,360.20 and 39,192.10

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Solution

The fourth proportional to 56,906.80, 85,360.20 and 39,192.10 is: 58,788.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,906.80 : 85,360.20 = 39,192.10 : x
  2. Step 2: Convert to fraction form
    56,906.80/85,360.20 = 39,192.10/x
  3. Step 3: Cross multiply
    56,906.80x = 85,360.20 × 39,192.10
  4. Step 4: Simplify right side
    56,906.80x = 3,345,445,494.42
  5. Step 5: Solve for x
    x = 3,345,445,494.42/56,906.80
  6. Step 6: Final answer
    x = 58,788.15

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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.