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Finding the Fourth Proportional to 108,532.60, 162,993.30 and 78,983.80

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Solution

The fourth proportional to 108,532.60, 162,993.30 and 78,983.80 is: 118,617.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,532.60 : 162,993.30 = 78,983.80 : x
  2. Step 2: Convert to fraction form
    108,532.60/162,993.30 = 78,983.80/x
  3. Step 3: Cross multiply
    108,532.60x = 162,993.30 × 78,983.80
  4. Step 4: Simplify right side
    108,532.60x = 12,873,830,208.54
  5. Step 5: Solve for x
    x = 12,873,830,208.54/108,532.60
  6. Step 6: Final answer
    x = 118,617.17

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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.