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Finding the Fourth Proportional to 79,148.66, 109,230.90 and 45,157.90

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Solution

The fourth proportional to 79,148.66, 109,230.90 and 45,157.90 is: 62,321.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,148.66 : 109,230.90 = 45,157.90 : x
  2. Step 2: Convert to fraction form
    79,148.66/109,230.90 = 45,157.90/x
  3. Step 3: Cross multiply
    79,148.66x = 109,230.90 × 45,157.90
  4. Step 4: Simplify right side
    79,148.66x = 4,932,638,059.11
  5. Step 5: Solve for x
    x = 4,932,638,059.11/79,148.66
  6. Step 6: Final answer
    x = 62,321.18

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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.