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Finding the Fourth Proportional to 79,585.81, 109,831.31 and 43,778.54

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Solution

The fourth proportional to 79,585.81, 109,831.31 and 43,778.54 is: 60,415.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,585.81 : 109,831.31 = 43,778.54 : x
  2. Step 2: Convert to fraction form
    79,585.81/109,831.31 = 43,778.54/x
  3. Step 3: Cross multiply
    79,585.81x = 109,831.31 × 43,778.54
  4. Step 4: Simplify right side
    79,585.81x = 4,808,254,617.94
  5. Step 5: Solve for x
    x = 4,808,254,617.94/79,585.81
  6. Step 6: Final answer
    x = 60,415.98

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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.