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Finding the Fourth Proportional to 61,388.76, 92,102.58 and 21,945

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Solution

The fourth proportional to 61,388.76, 92,102.58 and 21,945 is: 32,924.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,388.76 : 92,102.58 = 21,945 : x
  2. Step 2: Convert to fraction form
    61,388.76/92,102.58 = 21,945/x
  3. Step 3: Cross multiply
    61,388.76x = 92,102.58 × 21,945
  4. Step 4: Simplify right side
    61,388.76x = 2,021,191,118.10
  5. Step 5: Solve for x
    x = 2,021,191,118.10/61,388.76
  6. Step 6: Final answer
    x = 32,924.45

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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.