Home / 100,317.81-138,456.14-76,198.62

Finding the Fourth Proportional to 100,317.81, 138,456.14 and 76,198.62

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Solution

The fourth proportional to 100,317.81, 138,456.14 and 76,198.62 is: 105,167.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,317.81 : 138,456.14 = 76,198.62 : x
  2. Step 2: Convert to fraction form
    100,317.81/138,456.14 = 76,198.62/x
  3. Step 3: Cross multiply
    100,317.81x = 138,456.14 × 76,198.62
  4. Step 4: Simplify right side
    100,317.81x = 10,550,166,798.53
  5. Step 5: Solve for x
    x = 10,550,166,798.53/100,317.81
  6. Step 6: Final answer
    x = 105,167.44

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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.