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Finding the Fourth Proportional to 71,659.70, 98,664.51 and 65,016.69

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Solution

The fourth proportional to 71,659.70, 98,664.51 and 65,016.69 is: 89,518.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,659.70 : 98,664.51 = 65,016.69 : x
  2. Step 2: Convert to fraction form
    71,659.70/98,664.51 = 65,016.69/x
  3. Step 3: Cross multiply
    71,659.70x = 98,664.51 × 65,016.69
  4. Step 4: Simplify right side
    71,659.70x = 6,414,839,860.67
  5. Step 5: Solve for x
    x = 6,414,839,860.67/71,659.70
  6. Step 6: Final answer
    x = 89,518.10

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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.