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Finding the Fourth Proportional to 61,579.01, 85,017.82 and 47,212.20

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Solution

The fourth proportional to 61,579.01, 85,017.82 and 47,212.20 is: 65,182.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,579.01 : 85,017.82 = 47,212.20 : x
  2. Step 2: Convert to fraction form
    61,579.01/85,017.82 = 47,212.20/x
  3. Step 3: Cross multiply
    61,579.01x = 85,017.82 × 47,212.20
  4. Step 4: Simplify right side
    61,579.01x = 4,013,878,321.40
  5. Step 5: Solve for x
    x = 4,013,878,321.40/61,579.01
  6. Step 6: Final answer
    x = 65,182.57

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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.