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Finding the Fourth Proportional to 78,739.98, 118,108.35 and 26,149.92

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Solution

The fourth proportional to 78,739.98, 118,108.35 and 26,149.92 is: 39,224.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,739.98 : 118,108.35 = 26,149.92 : x
  2. Step 2: Convert to fraction form
    78,739.98/118,108.35 = 26,149.92/x
  3. Step 3: Cross multiply
    78,739.98x = 118,108.35 × 26,149.92
  4. Step 4: Simplify right side
    78,739.98x = 3,088,523,903.83
  5. Step 5: Solve for x
    x = 3,088,523,903.83/78,739.98
  6. Step 6: Final answer
    x = 39,224.34

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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.