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Finding the Fourth Proportional to 78,726.87, 118,046.94 and 53,795.07

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Solution

The fourth proportional to 78,726.87, 118,046.94 and 53,795.07 is: 80,662.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,726.87 : 118,046.94 = 53,795.07 : x
  2. Step 2: Convert to fraction form
    78,726.87/118,046.94 = 53,795.07/x
  3. Step 3: Cross multiply
    78,726.87x = 118,046.94 × 53,795.07
  4. Step 4: Simplify right side
    78,726.87x = 6,350,343,400.59
  5. Step 5: Solve for x
    x = 6,350,343,400.59/78,726.87
  6. Step 6: Final answer
    x = 80,662.97

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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.