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Finding the Fourth Proportional to 245,218.34, 367,817.31 and 85,330.89

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Solution

The fourth proportional to 245,218.34, 367,817.31 and 85,330.89 is: 127,992.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,218.34 : 367,817.31 = 85,330.89 : x
  2. Step 2: Convert to fraction form
    245,218.34/367,817.31 = 85,330.89/x
  3. Step 3: Cross multiply
    245,218.34x = 367,817.31 × 85,330.89
  4. Step 4: Simplify right side
    245,218.34x = 31,386,178,419.71
  5. Step 5: Solve for x
    x = 31,386,178,419.71/245,218.34
  6. Step 6: Final answer
    x = 127,992.79

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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.