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Finding the Fourth Proportional to 79,720.25, 110,009.90 and 43,909.49

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Solution

The fourth proportional to 79,720.25, 110,009.90 and 43,909.49 is: 60,592.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,720.25 : 110,009.90 = 43,909.49 : x
  2. Step 2: Convert to fraction form
    79,720.25/110,009.90 = 43,909.49/x
  3. Step 3: Cross multiply
    79,720.25x = 110,009.90 × 43,909.49
  4. Step 4: Simplify right side
    79,720.25x = 4,830,478,741.76
  5. Step 5: Solve for x
    x = 4,830,478,741.76/79,720.25
  6. Step 6: Final answer
    x = 60,592.87

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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.