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Finding the Fourth Proportional to 74,700.74, 103,129.21 and 49,584.58

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Solution

The fourth proportional to 74,700.74, 103,129.21 and 49,584.58 is: 68,454.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,700.74 : 103,129.21 = 49,584.58 : x
  2. Step 2: Convert to fraction form
    74,700.74/103,129.21 = 49,584.58/x
  3. Step 3: Cross multiply
    74,700.74x = 103,129.21 × 49,584.58
  4. Step 4: Simplify right side
    74,700.74x = 5,113,618,563.58
  5. Step 5: Solve for x
    x = 5,113,618,563.58/74,700.74
  6. Step 6: Final answer
    x = 68,454.72

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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.