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Finding the Fourth Proportional to 61,078.65, 91,631.06 and 18,957.85

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Solution

The fourth proportional to 61,078.65, 91,631.06 and 18,957.85 is: 28,440.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,078.65 : 91,631.06 = 18,957.85 : x
  2. Step 2: Convert to fraction form
    61,078.65/91,631.06 = 18,957.85/x
  3. Step 3: Cross multiply
    61,078.65x = 91,631.06 × 18,957.85
  4. Step 4: Simplify right side
    61,078.65x = 1,737,127,890.82
  5. Step 5: Solve for x
    x = 1,737,127,890.82/61,078.65
  6. Step 6: Final answer
    x = 28,440.84

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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.