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Finding the Fourth Proportional to 84,489.04, 126,615.12 and 65,683

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Solution

The fourth proportional to 84,489.04, 126,615.12 and 65,683 is: 98,432.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,489.04 : 126,615.12 = 65,683 : x
  2. Step 2: Convert to fraction form
    84,489.04/126,615.12 = 65,683/x
  3. Step 3: Cross multiply
    84,489.04x = 126,615.12 × 65,683
  4. Step 4: Simplify right side
    84,489.04x = 8,316,460,926.96
  5. Step 5: Solve for x
    x = 8,316,460,926.96/84,489.04
  6. Step 6: Final answer
    x = 98,432.42

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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.