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Finding the Fourth Proportional to 74,778.56, 103,187.76 and 42,944.48

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Solution

The fourth proportional to 74,778.56, 103,187.76 and 42,944.48 is: 59,259.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,778.56 : 103,187.76 = 42,944.48 : x
  2. Step 2: Convert to fraction form
    74,778.56/103,187.76 = 42,944.48/x
  3. Step 3: Cross multiply
    74,778.56x = 103,187.76 × 42,944.48
  4. Step 4: Simplify right side
    74,778.56x = 4,431,344,695.56
  5. Step 5: Solve for x
    x = 4,431,344,695.56/74,778.56
  6. Step 6: Final answer
    x = 59,259.56

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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.