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Finding the Fourth Proportional to 64,749.59, 89,358.55 and 39,258.39

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Solution

The fourth proportional to 64,749.59, 89,358.55 and 39,258.39 is: 54,179.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,749.59 : 89,358.55 = 39,258.39 : x
  2. Step 2: Convert to fraction form
    64,749.59/89,358.55 = 39,258.39/x
  3. Step 3: Cross multiply
    64,749.59x = 89,358.55 × 39,258.39
  4. Step 4: Simplify right side
    64,749.59x = 3,508,073,042.68
  5. Step 5: Solve for x
    x = 3,508,073,042.68/64,749.59
  6. Step 6: Final answer
    x = 54,179.08

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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.