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Finding the Fourth Proportional to 78,342.89, 108,119.87 and 44,357.36

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Solution

The fourth proportional to 78,342.89, 108,119.87 and 44,357.36 is: 61,216.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,342.89 : 108,119.87 = 44,357.36 : x
  2. Step 2: Convert to fraction form
    78,342.89/108,119.87 = 44,357.36/x
  3. Step 3: Cross multiply
    78,342.89x = 108,119.87 × 44,357.36
  4. Step 4: Simplify right side
    78,342.89x = 4,795,912,175.21
  5. Step 5: Solve for x
    x = 4,795,912,175.21/78,342.89
  6. Step 6: Final answer
    x = 61,216.95

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1.5x scale

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.