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Finding the Fourth Proportional to 74,367.55, 102,540.51 and 55,471.87

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Solution

The fourth proportional to 74,367.55, 102,540.51 and 55,471.87 is: 76,486.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,367.55 : 102,540.51 = 55,471.87 : x
  2. Step 2: Convert to fraction form
    74,367.55/102,540.51 = 55,471.87/x
  3. Step 3: Cross multiply
    74,367.55x = 102,540.51 × 55,471.87
  4. Step 4: Simplify right side
    74,367.55x = 5,688,113,840.45
  5. Step 5: Solve for x
    x = 5,688,113,840.45/74,367.55
  6. Step 6: Final answer
    x = 76,486.50

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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.