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Finding the Fourth Proportional to 279,038.34, 418,548.18 and 121,266.81

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Solution

The fourth proportional to 279,038.34, 418,548.18 and 121,266.81 is: 181,896.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,038.34 : 418,548.18 = 121,266.81 : x
  2. Step 2: Convert to fraction form
    279,038.34/418,548.18 = 121,266.81/x
  3. Step 3: Cross multiply
    279,038.34x = 418,548.18 × 121,266.81
  4. Step 4: Simplify right side
    279,038.34x = 50,756,002,619.91
  5. Step 5: Solve for x
    x = 50,756,002,619.91/279,038.34
  6. Step 6: Final answer
    x = 181,896.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.