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Finding the Fourth Proportional to 78,937.31, 118,403.21 and 19,773.48

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Solution

The fourth proportional to 78,937.31, 118,403.21 and 19,773.48 is: 29,659.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,937.31 : 118,403.21 = 19,773.48 : x
  2. Step 2: Convert to fraction form
    78,937.31/118,403.21 = 19,773.48/x
  3. Step 3: Cross multiply
    78,937.31x = 118,403.21 × 19,773.48
  4. Step 4: Simplify right side
    78,937.31x = 2,341,243,406.00
  5. Step 5: Solve for x
    x = 2,341,243,406.00/78,937.31
  6. Step 6: Final answer
    x = 29,659.53

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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.