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Finding the Fourth Proportional to 115,831.25, 159,846.05 and 65,530.25

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Solution

The fourth proportional to 115,831.25, 159,846.05 and 65,530.25 is: 90,431.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,831.25 : 159,846.05 = 65,530.25 : x
  2. Step 2: Convert to fraction form
    115,831.25/159,846.05 = 65,530.25/x
  3. Step 3: Cross multiply
    115,831.25x = 159,846.05 × 65,530.25
  4. Step 4: Simplify right side
    115,831.25x = 10,474,751,290.36
  5. Step 5: Solve for x
    x = 10,474,751,290.36/115,831.25
  6. Step 6: Final answer
    x = 90,431.13

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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.