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Finding the Fourth Proportional to 52,861.68, 79,292.52 and 21,281.40

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Solution

The fourth proportional to 52,861.68, 79,292.52 and 21,281.40 is: 31,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,861.68 : 79,292.52 = 21,281.40 : x
  2. Step 2: Convert to fraction form
    52,861.68/79,292.52 = 21,281.40/x
  3. Step 3: Cross multiply
    52,861.68x = 79,292.52 × 21,281.40
  4. Step 4: Simplify right side
    52,861.68x = 1,687,455,835.13
  5. Step 5: Solve for x
    x = 1,687,455,835.13/52,861.68
  6. Step 6: Final answer
    x = 31,922.10

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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.