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Finding the Fourth Proportional to 64,770, 89,381.26 and 36,089.55

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Solution

The fourth proportional to 64,770, 89,381.26 and 36,089.55 is: 49,802.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,770 : 89,381.26 = 36,089.55 : x
  2. Step 2: Convert to fraction form
    64,770/89,381.26 = 36,089.55/x
  3. Step 3: Cross multiply
    64,770x = 89,381.26 × 36,089.55
  4. Step 4: Simplify right side
    64,770x = 3,225,729,451.83
  5. Step 5: Solve for x
    x = 3,225,729,451.83/64,770
  6. Step 6: Final answer
    x = 49,802.83

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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.