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Finding the Fourth Proportional to 71,969.56, 99,395.44 and 54,790.54

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Solution

The fourth proportional to 71,969.56, 99,395.44 and 54,790.54 is: 75,669.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,969.56 : 99,395.44 = 54,790.54 : x
  2. Step 2: Convert to fraction form
    71,969.56/99,395.44 = 54,790.54/x
  3. Step 3: Cross multiply
    71,969.56x = 99,395.44 × 54,790.54
  4. Step 4: Simplify right side
    71,969.56x = 5,445,929,831.14
  5. Step 5: Solve for x
    x = 5,445,929,831.14/71,969.56
  6. Step 6: Final answer
    x = 75,669.91

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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.