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Finding the Fourth Proportional to 100,701.69, 138,965.56 and 55,379.67

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Solution

The fourth proportional to 100,701.69, 138,965.56 and 55,379.67 is: 76,422.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,701.69 : 138,965.56 = 55,379.67 : x
  2. Step 2: Convert to fraction form
    100,701.69/138,965.56 = 55,379.67/x
  3. Step 3: Cross multiply
    100,701.69x = 138,965.56 × 55,379.67
  4. Step 4: Simplify right side
    100,701.69x = 7,695,866,854.17
  5. Step 5: Solve for x
    x = 7,695,866,854.17/100,701.69
  6. Step 6: Final answer
    x = 76,422.42

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1.5x scale

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.