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Finding the Fourth Proportional to 52,769.88, 79,154.01 and 21,187.98

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Solution

The fourth proportional to 52,769.88, 79,154.01 and 21,187.98 is: 31,781.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,769.88 : 79,154.01 = 21,187.98 : x
  2. Step 2: Convert to fraction form
    52,769.88/79,154.01 = 21,187.98/x
  3. Step 3: Cross multiply
    52,769.88x = 79,154.01 × 21,187.98
  4. Step 4: Simplify right side
    52,769.88x = 1,677,113,580.80
  5. Step 5: Solve for x
    x = 1,677,113,580.80/52,769.88
  6. Step 6: Final answer
    x = 31,781.64

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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.