Home / 137,749.70-189,919.95-105,522.50

Finding the Fourth Proportional to 137,749.70, 189,919.95 and 105,522.50

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Solution

The fourth proportional to 137,749.70, 189,919.95 and 105,522.50 is: 145,487.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,749.70 : 189,919.95 = 105,522.50 : x
  2. Step 2: Convert to fraction form
    137,749.70/189,919.95 = 105,522.50/x
  3. Step 3: Cross multiply
    137,749.70x = 189,919.95 × 105,522.50
  4. Step 4: Simplify right side
    137,749.70x = 20,040,828,002.97
  5. Step 5: Solve for x
    x = 20,040,828,002.97/137,749.70
  6. Step 6: Final answer
    x = 145,487.27

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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.