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Finding the Fourth Proportional to 66,688.82, 100,103.70 and 65,182.89

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Solution

The fourth proportional to 66,688.82, 100,103.70 and 65,182.89 is: 97,843.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,688.82 : 100,103.70 = 65,182.89 : x
  2. Step 2: Convert to fraction form
    66,688.82/100,103.70 = 65,182.89/x
  3. Step 3: Cross multiply
    66,688.82x = 100,103.70 × 65,182.89
  4. Step 4: Simplify right side
    66,688.82x = 6,525,048,465.69
  5. Step 5: Solve for x
    x = 6,525,048,465.69/66,688.82
  6. Step 6: Final answer
    x = 97,843.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.