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Finding the Fourth Proportional to 235,789.45, 353,739.51 and 78,017.89

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Solution

The fourth proportional to 235,789.45, 353,739.51 and 78,017.89 is: 117,045.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,789.45 : 353,739.51 = 78,017.89 : x
  2. Step 2: Convert to fraction form
    235,789.45/353,739.51 = 78,017.89/x
  3. Step 3: Cross multiply
    235,789.45x = 353,739.51 × 78,017.89
  4. Step 4: Simplify right side
    235,789.45x = 27,598,010,179.83
  5. Step 5: Solve for x
    x = 27,598,010,179.83/235,789.45
  6. Step 6: Final answer
    x = 117,045.14

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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.