Home / 189,145.86-261,021.63-103,105.55

Finding the Fourth Proportional to 189,145.86, 261,021.63 and 103,105.55

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Solution

The fourth proportional to 189,145.86, 261,021.63 and 103,105.55 is: 142,285.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,145.86 : 261,021.63 = 103,105.55 : x
  2. Step 2: Convert to fraction form
    189,145.86/261,021.63 = 103,105.55/x
  3. Step 3: Cross multiply
    189,145.86x = 261,021.63 × 103,105.55
  4. Step 4: Simplify right side
    189,145.86x = 26,912,777,417.94
  5. Step 5: Solve for x
    x = 26,912,777,417.94/189,145.86
  6. Step 6: Final answer
    x = 142,285.84

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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.