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Finding the Fourth Proportional to 69,090.10, 103,653.25 and 21,703.28

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Solution

The fourth proportional to 69,090.10, 103,653.25 and 21,703.28 is: 32,560.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,090.10 : 103,653.25 = 21,703.28 : x
  2. Step 2: Convert to fraction form
    69,090.10/103,653.25 = 21,703.28/x
  3. Step 3: Cross multiply
    69,090.10x = 103,653.25 × 21,703.28
  4. Step 4: Simplify right side
    69,090.10x = 2,249,614,935.14
  5. Step 5: Solve for x
    x = 2,249,614,935.14/69,090.10
  6. Step 6: Final answer
    x = 32,560.60

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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.