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Finding the Fourth Proportional to 68,854.94, 103,021.77 and 40,790.06

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Solution

The fourth proportional to 68,854.94, 103,021.77 and 40,790.06 is: 61,030.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,854.94 : 103,021.77 = 40,790.06 : x
  2. Step 2: Convert to fraction form
    68,854.94/103,021.77 = 40,790.06/x
  3. Step 3: Cross multiply
    68,854.94x = 103,021.77 × 40,790.06
  4. Step 4: Simplify right side
    68,854.94x = 4,202,264,179.61
  5. Step 5: Solve for x
    x = 4,202,264,179.61/68,854.94
  6. Step 6: Final answer
    x = 61,030.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.