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Finding the Fourth Proportional to 78,539.64, 108,389.26 and 44,549.48

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Solution

The fourth proportional to 78,539.64, 108,389.26 and 44,549.48 is: 61,480.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,539.64 : 108,389.26 = 44,549.48 : x
  2. Step 2: Convert to fraction form
    78,539.64/108,389.26 = 44,549.48/x
  3. Step 3: Cross multiply
    78,539.64x = 108,389.26 × 44,549.48
  4. Step 4: Simplify right side
    78,539.64x = 4,828,685,170.58
  5. Step 5: Solve for x
    x = 4,828,685,170.58/78,539.64
  6. Step 6: Final answer
    x = 61,480.87

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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.