Home / 128,771.25-193,091.27-53,871.09

Finding the Fourth Proportional to 128,771.25, 193,091.27 and 53,871.09

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Solution

The fourth proportional to 128,771.25, 193,091.27 and 53,871.09 is: 80,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,771.25 : 193,091.27 = 53,871.09 : x
  2. Step 2: Convert to fraction form
    128,771.25/193,091.27 = 53,871.09/x
  3. Step 3: Cross multiply
    128,771.25x = 193,091.27 × 53,871.09
  4. Step 4: Simplify right side
    128,771.25x = 10,402,036,915.03
  5. Step 5: Solve for x
    x = 10,402,036,915.03/128,771.25
  6. Step 6: Final answer
    x = 80,779.19

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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.