Home / 100,619.04-138,847.55-55,296.05

Finding the Fourth Proportional to 100,619.04, 138,847.55 and 55,296.05

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Solution

The fourth proportional to 100,619.04, 138,847.55 and 55,296.05 is: 76,304.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,619.04 : 138,847.55 = 55,296.05 : x
  2. Step 2: Convert to fraction form
    100,619.04/138,847.55 = 55,296.05/x
  3. Step 3: Cross multiply
    100,619.04x = 138,847.55 × 55,296.05
  4. Step 4: Simplify right side
    100,619.04x = 7,677,721,421.80
  5. Step 5: Solve for x
    x = 7,677,721,421.80/100,619.04
  6. Step 6: Final answer
    x = 76,304.85

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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.