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Finding the Fourth Proportional to 78,392, 108,182.12 and 44,399.64

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Solution

The fourth proportional to 78,392, 108,182.12 and 44,399.64 is: 61,272.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,392 : 108,182.12 = 44,399.64 : x
  2. Step 2: Convert to fraction form
    78,392/108,182.12 = 44,399.64/x
  3. Step 3: Cross multiply
    78,392x = 108,182.12 × 44,399.64
  4. Step 4: Simplify right side
    78,392x = 4,803,247,293.44
  5. Step 5: Solve for x
    x = 4,803,247,293.44/78,392
  6. Step 6: Final answer
    x = 61,272.16

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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.