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Finding the Fourth Proportional to 218,612, 301,632.72 and 123,099.68

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Solution

The fourth proportional to 218,612, 301,632.72 and 123,099.68 is: 169,848.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,612 : 301,632.72 = 123,099.68 : x
  2. Step 2: Convert to fraction form
    218,612/301,632.72 = 123,099.68/x
  3. Step 3: Cross multiply
    218,612x = 301,632.72 × 123,099.68
  4. Step 4: Simplify right side
    218,612x = 37,130,891,309.53
  5. Step 5: Solve for x
    x = 37,130,891,309.53/218,612
  6. Step 6: Final answer
    x = 169,848.37

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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.