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Finding the Fourth Proportional to 79,307.46, 109,415.90 and 45,291.42

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Solution

The fourth proportional to 79,307.46, 109,415.90 and 45,291.42 is: 62,485.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,307.46 : 109,415.90 = 45,291.42 : x
  2. Step 2: Convert to fraction form
    79,307.46/109,415.90 = 45,291.42/x
  3. Step 3: Cross multiply
    79,307.46x = 109,415.90 × 45,291.42
  4. Step 4: Simplify right side
    79,307.46x = 4,955,601,481.58
  5. Step 5: Solve for x
    x = 4,955,601,481.58/79,307.46
  6. Step 6: Final answer
    x = 62,485.94

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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.