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Finding the Fourth Proportional to 78,221.52, 107,960.58 and 46,407.96

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Solution

The fourth proportional to 78,221.52, 107,960.58 and 46,407.96 is: 64,051.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,221.52 : 107,960.58 = 46,407.96 : x
  2. Step 2: Convert to fraction form
    78,221.52/107,960.58 = 46,407.96/x
  3. Step 3: Cross multiply
    78,221.52x = 107,960.58 × 46,407.96
  4. Step 4: Simplify right side
    78,221.52x = 5,010,230,278.22
  5. Step 5: Solve for x
    x = 5,010,230,278.22/78,221.52
  6. Step 6: Final answer
    x = 64,051.81

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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.