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Finding the Fourth Proportional to 71,831.40, 99,140.40 and 41,636.04

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Solution

The fourth proportional to 71,831.40, 99,140.40 and 41,636.04 is: 57,465.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,831.40 : 99,140.40 = 41,636.04 : x
  2. Step 2: Convert to fraction form
    71,831.40/99,140.40 = 41,636.04/x
  3. Step 3: Cross multiply
    71,831.40x = 99,140.40 × 41,636.04
  4. Step 4: Simplify right side
    71,831.40x = 4,127,813,660.02
  5. Step 5: Solve for x
    x = 4,127,813,660.02/71,831.40
  6. Step 6: Final answer
    x = 57,465.31

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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.