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Finding the Fourth Proportional to 61,261.99, 91,905.74 and 19,140.37

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Solution

The fourth proportional to 61,261.99, 91,905.74 and 19,140.37 is: 28,714.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,261.99 : 91,905.74 = 19,140.37 : x
  2. Step 2: Convert to fraction form
    61,261.99/91,905.74 = 19,140.37/x
  3. Step 3: Cross multiply
    61,261.99x = 91,905.74 × 19,140.37
  4. Step 4: Simplify right side
    61,261.99x = 1,759,109,773.02
  5. Step 5: Solve for x
    x = 1,759,109,773.02/61,261.99
  6. Step 6: Final answer
    x = 28,714.54

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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.