Home / 123,619.84-170,588.24-72,624.64

Finding the Fourth Proportional to 123,619.84, 170,588.24 and 72,624.64

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Solution

The fourth proportional to 123,619.84, 170,588.24 and 72,624.64 is: 100,217.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,619.84 : 170,588.24 = 72,624.64 : x
  2. Step 2: Convert to fraction form
    123,619.84/170,588.24 = 72,624.64/x
  3. Step 3: Cross multiply
    123,619.84x = 170,588.24 × 72,624.64
  4. Step 4: Simplify right side
    123,619.84x = 12,388,909,518.23
  5. Step 5: Solve for x
    x = 12,388,909,518.23/123,619.84
  6. Step 6: Final answer
    x = 100,217.81

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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.