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Finding the Fourth Proportional to 78,696.87, 118,002.03 and 53,765.07

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Solution

The fourth proportional to 78,696.87, 118,002.03 and 53,765.07 is: 80,618.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,696.87 : 118,002.03 = 53,765.07 : x
  2. Step 2: Convert to fraction form
    78,696.87/118,002.03 = 53,765.07/x
  3. Step 3: Cross multiply
    78,696.87x = 118,002.03 × 53,765.07
  4. Step 4: Simplify right side
    78,696.87x = 6,344,387,643.98
  5. Step 5: Solve for x
    x = 6,344,387,643.98/78,696.87
  6. Step 6: Final answer
    x = 80,618.04

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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.