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Finding the Fourth Proportional to 85,668.69, 118,285.15 and 68,765.91

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Solution

The fourth proportional to 85,668.69, 118,285.15 and 68,765.91 is: 94,947.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,668.69 : 118,285.15 = 68,765.91 : x
  2. Step 2: Convert to fraction form
    85,668.69/118,285.15 = 68,765.91/x
  3. Step 3: Cross multiply
    85,668.69x = 118,285.15 × 68,765.91
  4. Step 4: Simplify right side
    85,668.69x = 8,133,986,151.15
  5. Step 5: Solve for x
    x = 8,133,986,151.15/85,668.69
  6. Step 6: Final answer
    x = 94,947.02

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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.