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Finding the Fourth Proportional to 84,831.60, 127,101.60 and 71,709.60

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Solution

The fourth proportional to 84,831.60, 127,101.60 and 71,709.60 is: 107,441.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,831.60 : 127,101.60 = 71,709.60 : x
  2. Step 2: Convert to fraction form
    84,831.60/127,101.60 = 71,709.60/x
  3. Step 3: Cross multiply
    84,831.60x = 127,101.60 × 71,709.60
  4. Step 4: Simplify right side
    84,831.60x = 9,114,404,895.36
  5. Step 5: Solve for x
    x = 9,114,404,895.36/84,831.60
  6. Step 6: Final answer
    x = 107,441.15

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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.