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Finding the Fourth Proportional to 78,863.76, 118,294.97 and 19,699.02

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Solution

The fourth proportional to 78,863.76, 118,294.97 and 19,699.02 is: 29,548.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,863.76 : 118,294.97 = 19,699.02 : x
  2. Step 2: Convert to fraction form
    78,863.76/118,294.97 = 19,699.02/x
  3. Step 3: Cross multiply
    78,863.76x = 118,294.97 × 19,699.02
  4. Step 4: Simplify right side
    78,863.76x = 2,330,294,881.43
  5. Step 5: Solve for x
    x = 2,330,294,881.43/78,863.76
  6. Step 6: Final answer
    x = 29,548.36

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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.