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Finding the Fourth Proportional to 119,805.86, 179,685.30 and 39,831.32

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Solution

The fourth proportional to 119,805.86, 179,685.30 and 39,831.32 is: 59,739.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,805.86 : 179,685.30 = 39,831.32 : x
  2. Step 2: Convert to fraction form
    119,805.86/179,685.30 = 39,831.32/x
  3. Step 3: Cross multiply
    119,805.86x = 179,685.30 × 39,831.32
  4. Step 4: Simplify right side
    119,805.86x = 7,157,102,683.60
  5. Step 5: Solve for x
    x = 7,157,102,683.60/119,805.86
  6. Step 6: Final answer
    x = 59,739.17

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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.