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Finding the Fourth Proportional to 103,653.38, 155,499.78 and 71,766.92

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Solution

The fourth proportional to 103,653.38, 155,499.78 and 71,766.92 is: 107,664.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,653.38 : 155,499.78 = 71,766.92 : x
  2. Step 2: Convert to fraction form
    103,653.38/155,499.78 = 71,766.92/x
  3. Step 3: Cross multiply
    103,653.38x = 155,499.78 × 71,766.92
  4. Step 4: Simplify right side
    103,653.38x = 11,159,740,271.28
  5. Step 5: Solve for x
    x = 11,159,740,271.28/103,653.38
  6. Step 6: Final answer
    x = 107,664.03

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1.5x scale

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.