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Finding the Fourth Proportional to 120,737.60, 181,106.40 and 75,831.20

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Solution

The fourth proportional to 120,737.60, 181,106.40 and 75,831.20 is: 113,746.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,737.60 : 181,106.40 = 75,831.20 : x
  2. Step 2: Convert to fraction form
    120,737.60/181,106.40 = 75,831.20/x
  3. Step 3: Cross multiply
    120,737.60x = 181,106.40 × 75,831.20
  4. Step 4: Simplify right side
    120,737.60x = 13,733,515,639.68
  5. Step 5: Solve for x
    x = 13,733,515,639.68/120,737.60
  6. Step 6: Final answer
    x = 113,746.80

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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.