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Finding the Fourth Proportional to 71,161.48, 106,742.08 and 66,831.22

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Solution

The fourth proportional to 71,161.48, 106,742.08 and 66,831.22 is: 100,246.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,161.48 : 106,742.08 = 66,831.22 : x
  2. Step 2: Convert to fraction form
    71,161.48/106,742.08 = 66,831.22/x
  3. Step 3: Cross multiply
    71,161.48x = 106,742.08 × 66,831.22
  4. Step 4: Simplify right side
    71,161.48x = 7,133,703,431.74
  5. Step 5: Solve for x
    x = 7,133,703,431.74/71,161.48
  6. Step 6: Final answer
    x = 100,246.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.