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Finding the Fourth Proportional to 64,792.90, 89,412.54 and 36,112.72

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Solution

The fourth proportional to 64,792.90, 89,412.54 and 36,112.72 is: 49,834.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,792.90 : 89,412.54 = 36,112.72 : x
  2. Step 2: Convert to fraction form
    64,792.90/89,412.54 = 36,112.72/x
  3. Step 3: Cross multiply
    64,792.90x = 89,412.54 × 36,112.72
  4. Step 4: Simplify right side
    64,792.90x = 3,228,930,021.51
  5. Step 5: Solve for x
    x = 3,228,930,021.51/64,792.90
  6. Step 6: Final answer
    x = 49,834.63

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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.