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Finding the Fourth Proportional to 64,984.68, 89,693.73 and 38,128.32

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Solution

The fourth proportional to 64,984.68, 89,693.73 and 38,128.32 is: 52,625.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,984.68 : 89,693.73 = 38,128.32 : x
  2. Step 2: Convert to fraction form
    64,984.68/89,693.73 = 38,128.32/x
  3. Step 3: Cross multiply
    64,984.68x = 89,693.73 × 38,128.32
  4. Step 4: Simplify right side
    64,984.68x = 3,419,871,239.43
  5. Step 5: Solve for x
    x = 3,419,871,239.43/64,984.68
  6. Step 6: Final answer
    x = 52,625.81

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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.