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Finding the Fourth Proportional to 79,764.40, 119,646.60 and 68,683.60

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Solution

The fourth proportional to 79,764.40, 119,646.60 and 68,683.60 is: 103,025.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,764.40 : 119,646.60 = 68,683.60 : x
  2. Step 2: Convert to fraction form
    79,764.40/119,646.60 = 68,683.60/x
  3. Step 3: Cross multiply
    79,764.40x = 119,646.60 × 68,683.60
  4. Step 4: Simplify right side
    79,764.40x = 8,217,759,215.76
  5. Step 5: Solve for x
    x = 8,217,759,215.76/79,764.40
  6. Step 6: Final answer
    x = 103,025.40

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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.