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Finding the Fourth Proportional to 64,708.76, 89,314.98 and 39,579.32

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Solution

The fourth proportional to 64,708.76, 89,314.98 and 39,579.32 is: 54,629.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,708.76 : 89,314.98 = 39,579.32 : x
  2. Step 2: Convert to fraction form
    64,708.76/89,314.98 = 39,579.32/x
  3. Step 3: Cross multiply
    64,708.76x = 89,314.98 × 39,579.32
  4. Step 4: Simplify right side
    64,708.76x = 3,535,026,174.21
  5. Step 5: Solve for x
    x = 3,535,026,174.21/64,708.76
  6. Step 6: Final answer
    x = 54,629.79

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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.