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Finding the Fourth Proportional to 74,885.88, 103,342.70 and 40,894.64

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Solution

The fourth proportional to 74,885.88, 103,342.70 and 40,894.64 is: 56,434.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,885.88 : 103,342.70 = 40,894.64 : x
  2. Step 2: Convert to fraction form
    74,885.88/103,342.70 = 40,894.64/x
  3. Step 3: Cross multiply
    74,885.88x = 103,342.70 × 40,894.64
  4. Step 4: Simplify right side
    74,885.88x = 4,226,161,791.94
  5. Step 5: Solve for x
    x = 4,226,161,791.94/74,885.88
  6. Step 6: Final answer
    x = 56,434.69

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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.