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Finding the Fourth Proportional to 63,099.01, 86,899.45 and 61,721.20

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Solution

The fourth proportional to 63,099.01, 86,899.45 and 61,721.20 is: 85,001.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,099.01 : 86,899.45 = 61,721.20 : x
  2. Step 2: Convert to fraction form
    63,099.01/86,899.45 = 61,721.20/x
  3. Step 3: Cross multiply
    63,099.01x = 86,899.45 × 61,721.20
  4. Step 4: Simplify right side
    63,099.01x = 5,363,538,333.34
  5. Step 5: Solve for x
    x = 5,363,538,333.34/63,099.01
  6. Step 6: Final answer
    x = 85,001.94

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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.