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Finding the Fourth Proportional to 66,487.83, 91,740.68 and 39,632.84

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Solution

The fourth proportional to 66,487.83, 91,740.68 and 39,632.84 is: 54,685.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,487.83 : 91,740.68 = 39,632.84 : x
  2. Step 2: Convert to fraction form
    66,487.83/91,740.68 = 39,632.84/x
  3. Step 3: Cross multiply
    66,487.83x = 91,740.68 × 39,632.84
  4. Step 4: Simplify right side
    66,487.83x = 3,635,943,035.06
  5. Step 5: Solve for x
    x = 3,635,943,035.06/66,487.83
  6. Step 6: Final answer
    x = 54,685.84

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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.