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Finding the Fourth Proportional to 52,510.65, 78,770.88 and 20,913.09

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Solution

The fourth proportional to 52,510.65, 78,770.88 and 20,913.09 is: 31,371.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,510.65 : 78,770.88 = 20,913.09 : x
  2. Step 2: Convert to fraction form
    52,510.65/78,770.88 = 20,913.09/x
  3. Step 3: Cross multiply
    52,510.65x = 78,770.88 × 20,913.09
  4. Step 4: Simplify right side
    52,510.65x = 1,647,342,502.82
  5. Step 5: Solve for x
    x = 1,647,342,502.82/52,510.65
  6. Step 6: Final answer
    x = 31,371.59

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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.