Home / 71,831.30-99,130.74-39,999.54

Finding the Fourth Proportional to 71,831.30, 99,130.74 and 39,999.54

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Solution

The fourth proportional to 71,831.30, 99,130.74 and 39,999.54 is: 55,201.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,831.30 : 99,130.74 = 39,999.54 : x
  2. Step 2: Convert to fraction form
    71,831.30/99,130.74 = 39,999.54/x
  3. Step 3: Cross multiply
    71,831.30x = 99,130.74 × 39,999.54
  4. Step 4: Simplify right side
    71,831.30x = 3,965,183,999.86
  5. Step 5: Solve for x
    x = 3,965,183,999.86/71,831.30
  6. Step 6: Final answer
    x = 55,201.34

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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.