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Finding the Fourth Proportional to 45,840.70, 68,728.65 and 17,749.90

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Solution

The fourth proportional to 45,840.70, 68,728.65 and 17,749.90 is: 26,612.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,840.70 : 68,728.65 = 17,749.90 : x
  2. Step 2: Convert to fraction form
    45,840.70/68,728.65 = 17,749.90/x
  3. Step 3: Cross multiply
    45,840.70x = 68,728.65 × 17,749.90
  4. Step 4: Simplify right side
    45,840.70x = 1,219,926,664.64
  5. Step 5: Solve for x
    x = 1,219,926,664.64/45,840.70
  6. Step 6: Final answer
    x = 26,612.30

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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.