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Finding the Fourth Proportional to 64,278.57, 88,693.86 and 40,388.32

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Solution

The fourth proportional to 64,278.57, 88,693.86 and 40,388.32 is: 55,729.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,278.57 : 88,693.86 = 40,388.32 : x
  2. Step 2: Convert to fraction form
    64,278.57/88,693.86 = 40,388.32/x
  3. Step 3: Cross multiply
    64,278.57x = 88,693.86 × 40,388.32
  4. Step 4: Simplify right side
    64,278.57x = 3,582,195,999.72
  5. Step 5: Solve for x
    x = 3,582,195,999.72/64,278.57
  6. Step 6: Final answer
    x = 55,729.24

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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.