Home / 61,939.23-85,511.60-40,780

Finding the Fourth Proportional to 61,939.23, 85,511.60 and 40,780

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Solution

The fourth proportional to 61,939.23, 85,511.60 and 40,780 is: 56,299.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,939.23 : 85,511.60 = 40,780 : x
  2. Step 2: Convert to fraction form
    61,939.23/85,511.60 = 40,780/x
  3. Step 3: Cross multiply
    61,939.23x = 85,511.60 × 40,780
  4. Step 4: Simplify right side
    61,939.23x = 3,487,163,048
  5. Step 5: Solve for x
    x = 3,487,163,048/61,939.23
  6. Step 6: Final answer
    x = 56,299.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.