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Finding the Fourth Proportional to 78,892.38, 118,335.33 and 43,809.66

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Solution

The fourth proportional to 78,892.38, 118,335.33 and 43,809.66 is: 65,712.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,892.38 : 118,335.33 = 43,809.66 : x
  2. Step 2: Convert to fraction form
    78,892.38/118,335.33 = 43,809.66/x
  3. Step 3: Cross multiply
    78,892.38x = 118,335.33 × 43,809.66
  4. Step 4: Simplify right side
    78,892.38x = 5,184,230,573.29
  5. Step 5: Solve for x
    x = 5,184,230,573.29/78,892.38
  6. Step 6: Final answer
    x = 65,712.69

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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.