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Finding the Fourth Proportional to 78,168.69, 116,687.02 and 68,710.32

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Solution

The fourth proportional to 78,168.69, 116,687.02 and 68,710.32 is: 102,567.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,168.69 : 116,687.02 = 68,710.32 : x
  2. Step 2: Convert to fraction form
    78,168.69/116,687.02 = 68,710.32/x
  3. Step 3: Cross multiply
    78,168.69x = 116,687.02 × 68,710.32
  4. Step 4: Simplify right side
    78,168.69x = 8,017,601,557.06
  5. Step 5: Solve for x
    x = 8,017,601,557.06/78,168.69
  6. Step 6: Final answer
    x = 102,567.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.