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Finding the Fourth Proportional to 74,963.89, 103,440.15 and 48,142.72

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Solution

The fourth proportional to 74,963.89, 103,440.15 and 48,142.72 is: 66,430.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,963.89 : 103,440.15 = 48,142.72 : x
  2. Step 2: Convert to fraction form
    74,963.89/103,440.15 = 48,142.72/x
  3. Step 3: Cross multiply
    74,963.89x = 103,440.15 × 48,142.72
  4. Step 4: Simplify right side
    74,963.89x = 4,979,890,178.21
  5. Step 5: Solve for x
    x = 4,979,890,178.21/74,963.89
  6. Step 6: Final answer
    x = 66,430.52

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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.