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Finding the Fourth Proportional to 72,558.92, 100,130.78 and 39,853.89

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Solution

The fourth proportional to 72,558.92, 100,130.78 and 39,853.89 is: 54,998.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,558.92 : 100,130.78 = 39,853.89 : x
  2. Step 2: Convert to fraction form
    72,558.92/100,130.78 = 39,853.89/x
  3. Step 3: Cross multiply
    72,558.92x = 100,130.78 × 39,853.89
  4. Step 4: Simplify right side
    72,558.92x = 3,990,601,191.37
  5. Step 5: Solve for x
    x = 3,990,601,191.37/72,558.92
  6. Step 6: Final answer
    x = 54,998.08

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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.