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Finding the Fourth Proportional to 40,779, 61,177.30 and 12,698.48

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Solution

The fourth proportional to 40,779, 61,177.30 and 12,698.48 is: 19,050.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,779 : 61,177.30 = 12,698.48 : x
  2. Step 2: Convert to fraction form
    40,779/61,177.30 = 12,698.48/x
  3. Step 3: Cross multiply
    40,779x = 61,177.30 × 12,698.48
  4. Step 4: Simplify right side
    40,779x = 776,858,720.50
  5. Step 5: Solve for x
    x = 776,858,720.50/40,779
  6. Step 6: Final answer
    x = 19,050.46

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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.