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Finding the Fourth Proportional to 74,866.60, 103,311.48 and 40,868.32

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Solution

The fourth proportional to 74,866.60, 103,311.48 and 40,868.32 is: 56,395.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,866.60 : 103,311.48 = 40,868.32 : x
  2. Step 2: Convert to fraction form
    74,866.60/103,311.48 = 40,868.32/x
  3. Step 3: Cross multiply
    74,866.60x = 103,311.48 × 40,868.32
  4. Step 4: Simplify right side
    74,866.60x = 4,222,166,624.31
  5. Step 5: Solve for x
    x = 4,222,166,624.31/74,866.60
  6. Step 6: Final answer
    x = 56,395.86

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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.