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Finding the Fourth Proportional to 56,618.80, 78,138.32 and 33,958.68

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Solution

The fourth proportional to 56,618.80, 78,138.32 and 33,958.68 is: 46,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,618.80 : 78,138.32 = 33,958.68 : x
  2. Step 2: Convert to fraction form
    56,618.80/78,138.32 = 33,958.68/x
  3. Step 3: Cross multiply
    56,618.80x = 78,138.32 × 33,958.68
  4. Step 4: Simplify right side
    56,618.80x = 2,653,474,204.62
  5. Step 5: Solve for x
    x = 2,653,474,204.62/56,618.80
  6. Step 6: Final answer
    x = 46,865.60

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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.