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Finding the Fourth Proportional to 85,583.75, 118,065.81 and 55,378.81

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Solution

The fourth proportional to 85,583.75, 118,065.81 and 55,378.81 is: 76,397.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,583.75 : 118,065.81 = 55,378.81 : x
  2. Step 2: Convert to fraction form
    85,583.75/118,065.81 = 55,378.81/x
  3. Step 3: Cross multiply
    85,583.75x = 118,065.81 × 55,378.81
  4. Step 4: Simplify right side
    85,583.75x = 6,538,344,059.49
  5. Step 5: Solve for x
    x = 6,538,344,059.49/85,583.75
  6. Step 6: Final answer
    x = 76,397.03

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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.