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Finding the Fourth Proportional to 136,715.44, 205,071.88 and 43,221.20

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Solution

The fourth proportional to 136,715.44, 205,071.88 and 43,221.20 is: 64,831.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,715.44 : 205,071.88 = 43,221.20 : x
  2. Step 2: Convert to fraction form
    136,715.44/205,071.88 = 43,221.20/x
  3. Step 3: Cross multiply
    136,715.44x = 205,071.88 × 43,221.20
  4. Step 4: Simplify right side
    136,715.44x = 8,863,452,739.86
  5. Step 5: Solve for x
    x = 8,863,452,739.86/136,715.44
  6. Step 6: Final answer
    x = 64,831.40

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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.