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Finding the Fourth Proportional to 79,188.86, 118,805.16 and 70,484.60

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Solution

The fourth proportional to 79,188.86, 118,805.16 and 70,484.60 is: 105,746.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,188.86 : 118,805.16 = 70,484.60 : x
  2. Step 2: Convert to fraction form
    79,188.86/118,805.16 = 70,484.60/x
  3. Step 3: Cross multiply
    79,188.86x = 118,805.16 × 70,484.60
  4. Step 4: Simplify right side
    79,188.86x = 8,373,934,180.54
  5. Step 5: Solve for x
    x = 8,373,934,180.54/79,188.86
  6. Step 6: Final answer
    x = 105,746.37

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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.