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Finding the Fourth Proportional to 103,640.65, 155,460.98 and 82,904.65

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Solution

The fourth proportional to 103,640.65, 155,460.98 and 82,904.65 is: 124,356.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.65 : 155,460.98 = 82,904.65 : x
  2. Step 2: Convert to fraction form
    103,640.65/155,460.98 = 82,904.65/x
  3. Step 3: Cross multiply
    103,640.65x = 155,460.98 × 82,904.65
  4. Step 4: Simplify right side
    103,640.65x = 12,888,438,135.56
  5. Step 5: Solve for x
    x = 12,888,438,135.56/103,640.65
  6. Step 6: Final answer
    x = 124,356.98

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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.