Home / 100,619.28-138,855.87-55,302.21

Finding the Fourth Proportional to 100,619.28, 138,855.87 and 55,302.21

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Solution

The fourth proportional to 100,619.28, 138,855.87 and 55,302.21 is: 76,317.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,619.28 : 138,855.87 = 55,302.21 : x
  2. Step 2: Convert to fraction form
    100,619.28/138,855.87 = 55,302.21/x
  3. Step 3: Cross multiply
    100,619.28x = 138,855.87 × 55,302.21
  4. Step 4: Simplify right side
    100,619.28x = 7,679,036,482.47
  5. Step 5: Solve for x
    x = 7,679,036,482.47/100,619.28
  6. Step 6: Final answer
    x = 76,317.74

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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.