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Finding the Fourth Proportional to 74,561.78, 102,893.73 and 40,570.94

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Solution

The fourth proportional to 74,561.78, 102,893.73 and 40,570.94 is: 55,987.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,561.78 : 102,893.73 = 40,570.94 : x
  2. Step 2: Convert to fraction form
    74,561.78/102,893.73 = 40,570.94/x
  3. Step 3: Cross multiply
    74,561.78x = 102,893.73 × 40,570.94
  4. Step 4: Simplify right side
    74,561.78x = 4,174,495,346.21
  5. Step 5: Solve for x
    x = 4,174,495,346.21/74,561.78
  6. Step 6: Final answer
    x = 55,987.07

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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.