Home / 115,761.66-159,739.79-64,771.35

Finding the Fourth Proportional to 115,761.66, 159,739.79 and 64,771.35

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Solution

The fourth proportional to 115,761.66, 159,739.79 and 64,771.35 is: 89,378.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,761.66 : 159,739.79 = 64,771.35 : x
  2. Step 2: Convert to fraction form
    115,761.66/159,739.79 = 64,771.35/x
  3. Step 3: Cross multiply
    115,761.66x = 159,739.79 × 64,771.35
  4. Step 4: Simplify right side
    115,761.66x = 10,346,561,847.02
  5. Step 5: Solve for x
    x = 10,346,561,847.02/115,761.66
  6. Step 6: Final answer
    x = 89,378.14

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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.