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Finding the Fourth Proportional to 61,815.70, 92,711.40 and 20,262.70

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Solution

The fourth proportional to 61,815.70, 92,711.40 and 20,262.70 is: 30,390.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,815.70 : 92,711.40 = 20,262.70 : x
  2. Step 2: Convert to fraction form
    61,815.70/92,711.40 = 20,262.70/x
  3. Step 3: Cross multiply
    61,815.70x = 92,711.40 × 20,262.70
  4. Step 4: Simplify right side
    61,815.70x = 1,878,583,284.78
  5. Step 5: Solve for x
    x = 1,878,583,284.78/61,815.70
  6. Step 6: Final answer
    x = 30,390.07

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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.