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Finding the Fourth Proportional to 64,707.76, 89,313.60 and 39,578.32

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Solution

The fourth proportional to 64,707.76, 89,313.60 and 39,578.32 is: 54,628.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,707.76 : 89,313.60 = 39,578.32 : x
  2. Step 2: Convert to fraction form
    64,707.76/89,313.60 = 39,578.32/x
  3. Step 3: Cross multiply
    64,707.76x = 89,313.60 × 39,578.32
  4. Step 4: Simplify right side
    64,707.76x = 3,534,882,241.15
  5. Step 5: Solve for x
    x = 3,534,882,241.15/64,707.76
  6. Step 6: Final answer
    x = 54,628.41

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1.5x scale

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.