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Finding the Fourth Proportional to 52,985.97, 79,461.41 and 21,387.87

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Solution

The fourth proportional to 52,985.97, 79,461.41 and 21,387.87 is: 32,074.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,985.97 : 79,461.41 = 21,387.87 : x
  2. Step 2: Convert to fraction form
    52,985.97/79,461.41 = 21,387.87/x
  3. Step 3: Cross multiply
    52,985.97x = 79,461.41 × 21,387.87
  4. Step 4: Simplify right side
    52,985.97x = 1,699,510,200.16
  5. Step 5: Solve for x
    x = 1,699,510,200.16/52,985.97
  6. Step 6: Final answer
    x = 32,074.72

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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.