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Finding the Fourth Proportional to 218,642.04, 301,727.70 and 123,139.80

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Solution

The fourth proportional to 218,642.04, 301,727.70 and 123,139.80 is: 169,933.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,642.04 : 301,727.70 = 123,139.80 : x
  2. Step 2: Convert to fraction form
    218,642.04/301,727.70 = 123,139.80/x
  3. Step 3: Cross multiply
    218,642.04x = 301,727.70 × 123,139.80
  4. Step 4: Simplify right side
    218,642.04x = 37,154,688,632.46
  5. Step 5: Solve for x
    x = 37,154,688,632.46/218,642.04
  6. Step 6: Final answer
    x = 169,933.87

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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.