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Finding the Fourth Proportional to 87,268, 130,902 and 21,604

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Solution

The fourth proportional to 87,268, 130,902 and 21,604 is: 32,406

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,268 : 130,902 = 21,604 : x
  2. Step 2: Convert to fraction form
    87,268/130,902 = 21,604/x
  3. Step 3: Cross multiply
    87,268x = 130,902 × 21,604
  4. Step 4: Simplify right side
    87,268x = 2,828,006,808
  5. Step 5: Solve for x
    x = 2,828,006,808/87,268
  6. Step 6: Final answer
    x = 32,406

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.