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Finding the Fourth Proportional to 69,090.87, 103,097.45 and 61,644.14

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Solution

The fourth proportional to 69,090.87, 103,097.45 and 61,644.14 is: 91,985.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,090.87 : 103,097.45 = 61,644.14 : x
  2. Step 2: Convert to fraction form
    69,090.87/103,097.45 = 61,644.14/x
  3. Step 3: Cross multiply
    69,090.87x = 103,097.45 × 61,644.14
  4. Step 4: Simplify right side
    69,090.87x = 6,355,352,817.74
  5. Step 5: Solve for x
    x = 6,355,352,817.74/69,090.87
  6. Step 6: Final answer
    x = 91,985.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.