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Finding the Fourth Proportional to 61,878.88, 92,820.14 and 15,131.76

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Solution

The fourth proportional to 61,878.88, 92,820.14 and 15,131.76 is: 22,698.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,878.88 : 92,820.14 = 15,131.76 : x
  2. Step 2: Convert to fraction form
    61,878.88/92,820.14 = 15,131.76/x
  3. Step 3: Cross multiply
    61,878.88x = 92,820.14 × 15,131.76
  4. Step 4: Simplify right side
    61,878.88x = 1,404,532,081.65
  5. Step 5: Solve for x
    x = 1,404,532,081.65/61,878.88
  6. Step 6: Final answer
    x = 22,698.09

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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.