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Finding the Fourth Proportional to 100,636.66, 138,732.22 and 70,327.88

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Solution

The fourth proportional to 100,636.66, 138,732.22 and 70,327.88 is: 96,950.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,636.66 : 138,732.22 = 70,327.88 : x
  2. Step 2: Convert to fraction form
    100,636.66/138,732.22 = 70,327.88/x
  3. Step 3: Cross multiply
    100,636.66x = 138,732.22 × 70,327.88
  4. Step 4: Simplify right side
    100,636.66x = 9,756,742,920.29
  5. Step 5: Solve for x
    x = 9,756,742,920.29/100,636.66
  6. Step 6: Final answer
    x = 96,950.19

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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.