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Finding the Fourth Proportional to 79,217.86, 118,543.65 and 68,810.50

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Solution

The fourth proportional to 79,217.86, 118,543.65 and 68,810.50 is: 102,969.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,217.86 : 118,543.65 = 68,810.50 : x
  2. Step 2: Convert to fraction form
    79,217.86/118,543.65 = 68,810.50/x
  3. Step 3: Cross multiply
    79,217.86x = 118,543.65 × 68,810.50
  4. Step 4: Simplify right side
    79,217.86x = 8,157,047,828.33
  5. Step 5: Solve for x
    x = 8,157,047,828.33/79,217.86
  6. Step 6: Final answer
    x = 102,969.81

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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.