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Finding the Fourth Proportional to 68,290.48, 102,435.72 and 21,548.08

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Solution

The fourth proportional to 68,290.48, 102,435.72 and 21,548.08 is: 32,322.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,290.48 : 102,435.72 = 21,548.08 : x
  2. Step 2: Convert to fraction form
    68,290.48/102,435.72 = 21,548.08/x
  3. Step 3: Cross multiply
    68,290.48x = 102,435.72 × 21,548.08
  4. Step 4: Simplify right side
    68,290.48x = 2,207,293,089.42
  5. Step 5: Solve for x
    x = 2,207,293,089.42/68,290.48
  6. Step 6: Final answer
    x = 32,322.12

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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.