Home / 42,721.78-64,099.32-17,755.60

Finding the Fourth Proportional to 42,721.78, 64,099.32 and 17,755.60

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Solution

The fourth proportional to 42,721.78, 64,099.32 and 17,755.60 is: 26,640.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,721.78 : 64,099.32 = 17,755.60 : x
  2. Step 2: Convert to fraction form
    42,721.78/64,099.32 = 17,755.60/x
  3. Step 3: Cross multiply
    42,721.78x = 64,099.32 × 17,755.60
  4. Step 4: Simplify right side
    42,721.78x = 1,138,121,886.19
  5. Step 5: Solve for x
    x = 1,138,121,886.19/42,721.78
  6. Step 6: Final answer
    x = 26,640.32

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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.