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Finding the Fourth Proportional to 78,959.90, 118,496.99 and 30,935.68

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Solution

The fourth proportional to 78,959.90, 118,496.99 and 30,935.68 is: 46,425.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959.90 : 118,496.99 = 30,935.68 : x
  2. Step 2: Convert to fraction form
    78,959.90/118,496.99 = 30,935.68/x
  3. Step 3: Cross multiply
    78,959.90x = 118,496.99 × 30,935.68
  4. Step 4: Simplify right side
    78,959.90x = 3,665,784,744.70
  5. Step 5: Solve for x
    x = 3,665,784,744.70/78,959.90
  6. Step 6: Final answer
    x = 46,425.90

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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.