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Finding the Fourth Proportional to 72,391.52, 99,893.05 and 40,554.27

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Solution

The fourth proportional to 72,391.52, 99,893.05 and 40,554.27 is: 55,960.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,391.52 : 99,893.05 = 40,554.27 : x
  2. Step 2: Convert to fraction form
    72,391.52/99,893.05 = 40,554.27/x
  3. Step 3: Cross multiply
    72,391.52x = 99,893.05 × 40,554.27
  4. Step 4: Simplify right side
    72,391.52x = 4,051,089,619.44
  5. Step 5: Solve for x
    x = 4,051,089,619.44/72,391.52
  6. Step 6: Final answer
    x = 55,960.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.