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Finding the Fourth Proportional to 78,955.56, 108,980.64 and 48,745.80

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Solution

The fourth proportional to 78,955.56, 108,980.64 and 48,745.80 is: 67,282.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,955.56 : 108,980.64 = 48,745.80 : x
  2. Step 2: Convert to fraction form
    78,955.56/108,980.64 = 48,745.80/x
  3. Step 3: Cross multiply
    78,955.56x = 108,980.64 × 48,745.80
  4. Step 4: Simplify right side
    78,955.56x = 5,312,348,481.31
  5. Step 5: Solve for x
    x = 5,312,348,481.31/78,955.56
  6. Step 6: Final answer
    x = 67,282.77

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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.