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Finding the Fourth Proportional to 74,969.57, 103,535.48 and 64,849.43

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Solution

The fourth proportional to 74,969.57, 103,535.48 and 64,849.43 is: 89,559.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,969.57 : 103,535.48 = 64,849.43 : x
  2. Step 2: Convert to fraction form
    74,969.57/103,535.48 = 64,849.43/x
  3. Step 3: Cross multiply
    74,969.57x = 103,535.48 × 64,849.43
  4. Step 4: Simplify right side
    74,969.57x = 6,714,216,862.78
  5. Step 5: Solve for x
    x = 6,714,216,862.78/74,969.57
  6. Step 6: Final answer
    x = 89,559.23

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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.