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Finding the Fourth Proportional to 115,847.88, 159,885 and 64,879.98

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Solution

The fourth proportional to 115,847.88, 159,885 and 64,879.98 is: 89,542.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,847.88 : 159,885 = 64,879.98 : x
  2. Step 2: Convert to fraction form
    115,847.88/159,885 = 64,879.98/x
  3. Step 3: Cross multiply
    115,847.88x = 159,885 × 64,879.98
  4. Step 4: Simplify right side
    115,847.88x = 10,373,335,602.30
  5. Step 5: Solve for x
    x = 10,373,335,602.30/115,847.88
  6. Step 6: Final answer
    x = 89,542.73

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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.