Home / 81,391.56-112,314.24-47,400.30

Finding the Fourth Proportional to 81,391.56, 112,314.24 and 47,400.30

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Solution

The fourth proportional to 81,391.56, 112,314.24 and 47,400.30 is: 65,408.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.56 : 112,314.24 = 47,400.30 : x
  2. Step 2: Convert to fraction form
    81,391.56/112,314.24 = 47,400.30/x
  3. Step 3: Cross multiply
    81,391.56x = 112,314.24 × 47,400.30
  4. Step 4: Simplify right side
    81,391.56x = 5,323,728,670.27
  5. Step 5: Solve for x
    x = 5,323,728,670.27/81,391.56
  6. Step 6: Final answer
    x = 65,408.85

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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.