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Finding the Fourth Proportional to 78,806.84, 118,143.72 and 36,665.16

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Solution

The fourth proportional to 78,806.84, 118,143.72 and 36,665.16 is: 54,966.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,806.84 : 118,143.72 = 36,665.16 : x
  2. Step 2: Convert to fraction form
    78,806.84/118,143.72 = 36,665.16/x
  3. Step 3: Cross multiply
    78,806.84x = 118,143.72 × 36,665.16
  4. Step 4: Simplify right side
    78,806.84x = 4,331,758,396.80
  5. Step 5: Solve for x
    x = 4,331,758,396.80/78,806.84
  6. Step 6: Final answer
    x = 54,966.78

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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.