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Finding the Fourth Proportional to 74,908.88, 103,415.78 and 51,070.58

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Solution

The fourth proportional to 74,908.88, 103,415.78 and 51,070.58 is: 70,505.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,908.88 : 103,415.78 = 51,070.58 : x
  2. Step 2: Convert to fraction form
    74,908.88/103,415.78 = 51,070.58/x
  3. Step 3: Cross multiply
    74,908.88x = 103,415.78 × 51,070.58
  4. Step 4: Simplify right side
    74,908.88x = 5,281,503,865.75
  5. Step 5: Solve for x
    x = 5,281,503,865.75/74,908.88
  6. Step 6: Final answer
    x = 70,505.71

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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.