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Finding the Fourth Proportional to 78,955.56, 108,955.44 and 43,146.78

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Solution

The fourth proportional to 78,955.56, 108,955.44 and 43,146.78 is: 59,540.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,955.56 : 108,955.44 = 43,146.78 : x
  2. Step 2: Convert to fraction form
    78,955.56/108,955.44 = 43,146.78/x
  3. Step 3: Cross multiply
    78,955.56x = 108,955.44 × 43,146.78
  4. Step 4: Simplify right side
    78,955.56x = 4,701,076,399.48
  5. Step 5: Solve for x
    x = 4,701,076,399.48/78,955.56
  6. Step 6: Final answer
    x = 59,540.79

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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.