Home / 57,138.39-78,850.95-31,987.89

Finding the Fourth Proportional to 57,138.39, 78,850.95 and 31,987.89

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Solution

The fourth proportional to 57,138.39, 78,850.95 and 31,987.89 is: 44,143.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,138.39 : 78,850.95 = 31,987.89 : x
  2. Step 2: Convert to fraction form
    57,138.39/78,850.95 = 31,987.89/x
  3. Step 3: Cross multiply
    57,138.39x = 78,850.95 × 31,987.89
  4. Step 4: Simplify right side
    57,138.39x = 2,522,275,515.00
  5. Step 5: Solve for x
    x = 2,522,275,515.00/57,138.39
  6. Step 6: Final answer
    x = 44,143.27

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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.