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Finding the Fourth Proportional to 57,112.52, 78,810.90 and 31,958.60

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Solution

The fourth proportional to 57,112.52, 78,810.90 and 31,958.60 is: 44,100.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,112.52 : 78,810.90 = 31,958.60 : x
  2. Step 2: Convert to fraction form
    57,112.52/78,810.90 = 31,958.60/x
  3. Step 3: Cross multiply
    57,112.52x = 78,810.90 × 31,958.60
  4. Step 4: Simplify right side
    57,112.52x = 2,518,686,028.74
  5. Step 5: Solve for x
    x = 2,518,686,028.74/57,112.52
  6. Step 6: Final answer
    x = 44,100.42

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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.