Home / 115,859.72-159,873.19-64,865.36

Finding the Fourth Proportional to 115,859.72, 159,873.19 and 64,865.36

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Solution

The fourth proportional to 115,859.72, 159,873.19 and 64,865.36 is: 89,506.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,859.72 : 159,873.19 = 64,865.36 : x
  2. Step 2: Convert to fraction form
    115,859.72/159,873.19 = 64,865.36/x
  3. Step 3: Cross multiply
    115,859.72x = 159,873.19 × 64,865.36
  4. Step 4: Simplify right side
    115,859.72x = 10,370,232,023.70
  5. Step 5: Solve for x
    x = 10,370,232,023.70/115,859.72
  6. Step 6: Final answer
    x = 89,506.79

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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.