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Finding the Fourth Proportional to 118,841.68, 163,994.40 and 65,116

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Solution

The fourth proportional to 118,841.68, 163,994.40 and 65,116 is: 89,856.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,841.68 : 163,994.40 = 65,116 : x
  2. Step 2: Convert to fraction form
    118,841.68/163,994.40 = 65,116/x
  3. Step 3: Cross multiply
    118,841.68x = 163,994.40 × 65,116
  4. Step 4: Simplify right side
    118,841.68x = 10,678,659,350.40
  5. Step 5: Solve for x
    x = 10,678,659,350.40/118,841.68
  6. Step 6: Final answer
    x = 89,856.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.