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Finding the Fourth Proportional to 79,134.59, 109,213.16 and 47,302.81

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Solution

The fourth proportional to 79,134.59, 109,213.16 and 47,302.81 is: 65,282.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,134.59 : 109,213.16 = 47,302.81 : x
  2. Step 2: Convert to fraction form
    79,134.59/109,213.16 = 47,302.81/x
  3. Step 3: Cross multiply
    79,134.59x = 109,213.16 × 47,302.81
  4. Step 4: Simplify right side
    79,134.59x = 5,166,089,356.98
  5. Step 5: Solve for x
    x = 5,166,089,356.98/79,134.59
  6. Step 6: Final answer
    x = 65,282.32

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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.