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Finding the Fourth Proportional to 144,407.81, 199,287.34 and 80,745.46

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Solution

The fourth proportional to 144,407.81, 199,287.34 and 80,745.46 is: 111,431.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,407.81 : 199,287.34 = 80,745.46 : x
  2. Step 2: Convert to fraction form
    144,407.81/199,287.34 = 80,745.46/x
  3. Step 3: Cross multiply
    144,407.81x = 199,287.34 × 80,745.46
  4. Step 4: Simplify right side
    144,407.81x = 16,091,547,240.39
  5. Step 5: Solve for x
    x = 16,091,547,240.39/144,407.81
  6. Step 6: Final answer
    x = 111,431.28

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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.