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Finding the Fourth Proportional to 66,829.40, 100,269.70 and 65,779.80

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Solution

The fourth proportional to 66,829.40, 100,269.70 and 65,779.80 is: 98,694.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,829.40 : 100,269.70 = 65,779.80 : x
  2. Step 2: Convert to fraction form
    66,829.40/100,269.70 = 65,779.80/x
  3. Step 3: Cross multiply
    66,829.40x = 100,269.70 × 65,779.80
  4. Step 4: Simplify right side
    66,829.40x = 6,595,720,812.06
  5. Step 5: Solve for x
    x = 6,595,720,812.06/66,829.40
  6. Step 6: Final answer
    x = 98,694.90

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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.