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Finding the Fourth Proportional to 68,994.45, 103,393.66 and 53,139.51

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Solution

The fourth proportional to 68,994.45, 103,393.66 and 53,139.51 is: 79,633.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,994.45 : 103,393.66 = 53,139.51 : x
  2. Step 2: Convert to fraction form
    68,994.45/103,393.66 = 53,139.51/x
  3. Step 3: Cross multiply
    68,994.45x = 103,393.66 × 53,139.51
  4. Step 4: Simplify right side
    68,994.45x = 5,494,287,779.69
  5. Step 5: Solve for x
    x = 5,494,287,779.69/68,994.45
  6. Step 6: Final answer
    x = 79,633.77

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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.