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Finding the Fourth Proportional to 61,699.72, 85,145.62 and 33,405.40

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Solution

The fourth proportional to 61,699.72, 85,145.62 and 33,405.40 is: 46,099.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,699.72 : 85,145.62 = 33,405.40 : x
  2. Step 2: Convert to fraction form
    61,699.72/85,145.62 = 33,405.40/x
  3. Step 3: Cross multiply
    61,699.72x = 85,145.62 × 33,405.40
  4. Step 4: Simplify right side
    61,699.72x = 2,844,323,494.35
  5. Step 5: Solve for x
    x = 2,844,323,494.35/61,699.72
  6. Step 6: Final answer
    x = 46,099.46

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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.