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Finding the Fourth Proportional to 78,990.70, 118,515.63 and 41,016.28

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Solution

The fourth proportional to 78,990.70, 118,515.63 and 41,016.28 is: 61,539.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,990.70 : 118,515.63 = 41,016.28 : x
  2. Step 2: Convert to fraction form
    78,990.70/118,515.63 = 41,016.28/x
  3. Step 3: Cross multiply
    78,990.70x = 118,515.63 × 41,016.28
  4. Step 4: Simplify right side
    78,990.70x = 4,861,070,264.46
  5. Step 5: Solve for x
    x = 4,861,070,264.46/78,990.70
  6. Step 6: Final answer
    x = 61,539.78

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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.