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Finding the Fourth Proportional to 74,702.54, 103,086.50 and 40,710.31

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Solution

The fourth proportional to 74,702.54, 103,086.50 and 40,710.31 is: 56,178.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,702.54 : 103,086.50 = 40,710.31 : x
  2. Step 2: Convert to fraction form
    74,702.54/103,086.50 = 40,710.31/x
  3. Step 3: Cross multiply
    74,702.54x = 103,086.50 × 40,710.31
  4. Step 4: Simplify right side
    74,702.54x = 4,196,682,910.55
  5. Step 5: Solve for x
    x = 4,196,682,910.55/74,702.54
  6. Step 6: Final answer
    x = 56,178.58

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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.