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Finding the Fourth Proportional to 100,968.26, 139,359.95 and 62,756.67

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Solution

The fourth proportional to 100,968.26, 139,359.95 and 62,756.67 is: 86,618.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,968.26 : 139,359.95 = 62,756.67 : x
  2. Step 2: Convert to fraction form
    100,968.26/139,359.95 = 62,756.67/x
  3. Step 3: Cross multiply
    100,968.26x = 139,359.95 × 62,756.67
  4. Step 4: Simplify right side
    100,968.26x = 8,745,765,556.98
  5. Step 5: Solve for x
    x = 8,745,765,556.98/100,968.26
  6. Step 6: Final answer
    x = 86,618.96

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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.