Home / 115,831.82-159,840.09-64,145.21

Finding the Fourth Proportional to 115,831.82, 159,840.09 and 64,145.21

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Solution

The fourth proportional to 115,831.82, 159,840.09 and 64,145.21 is: 88,516.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,831.82 : 159,840.09 = 64,145.21 : x
  2. Step 2: Convert to fraction form
    115,831.82/159,840.09 = 64,145.21/x
  3. Step 3: Cross multiply
    115,831.82x = 159,840.09 × 64,145.21
  4. Step 4: Simplify right side
    115,831.82x = 10,252,975,019.54
  5. Step 5: Solve for x
    x = 10,252,975,019.54/115,831.82
  6. Step 6: Final answer
    x = 88,516.05

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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.