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Finding the Fourth Proportional to 64,964.16, 89,635.28 and 39,469.77

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Solution

The fourth proportional to 64,964.16, 89,635.28 and 39,469.77 is: 54,459.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,964.16 : 89,635.28 = 39,469.77 : x
  2. Step 2: Convert to fraction form
    64,964.16/89,635.28 = 39,469.77/x
  3. Step 3: Cross multiply
    64,964.16x = 89,635.28 × 39,469.77
  4. Step 4: Simplify right side
    64,964.16x = 3,537,883,688.14
  5. Step 5: Solve for x
    x = 3,537,883,688.14/64,964.16
  6. Step 6: Final answer
    x = 54,459.01

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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.