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Finding the Fourth Proportional to 52,872.71, 79,290.62 and 21,274.59

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Solution

The fourth proportional to 52,872.71, 79,290.62 and 21,274.59 is: 31,904.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,872.71 : 79,290.62 = 21,274.59 : x
  2. Step 2: Convert to fraction form
    52,872.71/79,290.62 = 21,274.59/x
  3. Step 3: Cross multiply
    52,872.71x = 79,290.62 × 21,274.59
  4. Step 4: Simplify right side
    52,872.71x = 1,686,875,204.42
  5. Step 5: Solve for x
    x = 1,686,875,204.42/52,872.71
  6. Step 6: Final answer
    x = 31,904.46

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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.