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Finding the Fourth Proportional to 64,971.79, 89,662.55 and 38,133.65

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Solution

The fourth proportional to 64,971.79, 89,662.55 and 38,133.65 is: 52,625.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,971.79 : 89,662.55 = 38,133.65 : x
  2. Step 2: Convert to fraction form
    64,971.79/89,662.55 = 38,133.65/x
  3. Step 3: Cross multiply
    64,971.79x = 89,662.55 × 38,133.65
  4. Step 4: Simplify right side
    64,971.79x = 3,419,160,333.30
  5. Step 5: Solve for x
    x = 3,419,160,333.30/64,971.79
  6. Step 6: Final answer
    x = 52,625.31

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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.