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Finding the Fourth Proportional to 74,715.68, 103,107.68 and 42,450.36

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Solution

The fourth proportional to 74,715.68, 103,107.68 and 42,450.36 is: 58,581.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,715.68 : 103,107.68 = 42,450.36 : x
  2. Step 2: Convert to fraction form
    74,715.68/103,107.68 = 42,450.36/x
  3. Step 3: Cross multiply
    74,715.68x = 103,107.68 × 42,450.36
  4. Step 4: Simplify right side
    74,715.68x = 4,376,958,134.76
  5. Step 5: Solve for x
    x = 4,376,958,134.76/74,715.68
  6. Step 6: Final answer
    x = 58,581.52

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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.