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Finding the Fourth Proportional to 79,781.40, 119,672.10 and 65,511.23

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Solution

The fourth proportional to 79,781.40, 119,672.10 and 65,511.23 is: 98,266.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,781.40 : 119,672.10 = 65,511.23 : x
  2. Step 2: Convert to fraction form
    79,781.40/119,672.10 = 65,511.23/x
  3. Step 3: Cross multiply
    79,781.40x = 119,672.10 × 65,511.23
  4. Step 4: Simplify right side
    79,781.40x = 7,839,865,869.32
  5. Step 5: Solve for x
    x = 7,839,865,869.32/79,781.40
  6. Step 6: Final answer
    x = 98,266.84

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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.