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Finding the Fourth Proportional to 78,338.56, 108,163.36 and 48,164.32

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Solution

The fourth proportional to 78,338.56, 108,163.36 and 48,164.32 is: 66,501.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,338.56 : 108,163.36 = 48,164.32 : x
  2. Step 2: Convert to fraction form
    78,338.56/108,163.36 = 48,164.32/x
  3. Step 3: Cross multiply
    78,338.56x = 108,163.36 × 48,164.32
  4. Step 4: Simplify right side
    78,338.56x = 5,209,614,683.32
  5. Step 5: Solve for x
    x = 5,209,614,683.32/78,338.56
  6. Step 6: Final answer
    x = 66,501.28

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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.