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Finding the Fourth Proportional to 56,857.96, 78,367.62 and 39,867.40

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Solution

The fourth proportional to 56,857.96, 78,367.62 and 39,867.40 is: 54,949.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,857.96 : 78,367.62 = 39,867.40 : x
  2. Step 2: Convert to fraction form
    56,857.96/78,367.62 = 39,867.40/x
  3. Step 3: Cross multiply
    56,857.96x = 78,367.62 × 39,867.40
  4. Step 4: Simplify right side
    56,857.96x = 3,124,313,253.59
  5. Step 5: Solve for x
    x = 3,124,313,253.59/56,857.96
  6. Step 6: Final answer
    x = 54,949.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.