Home / 81,189.98-121,800.09-28,632.86

Finding the Fourth Proportional to 81,189.98, 121,800.09 and 28,632.86

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Solution

The fourth proportional to 81,189.98, 121,800.09 and 28,632.86 is: 42,954.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,189.98 : 121,800.09 = 28,632.86 : x
  2. Step 2: Convert to fraction form
    81,189.98/121,800.09 = 28,632.86/x
  3. Step 3: Cross multiply
    81,189.98x = 121,800.09 × 28,632.86
  4. Step 4: Simplify right side
    81,189.98x = 3,487,484,924.96
  5. Step 5: Solve for x
    x = 3,487,484,924.96/81,189.98
  6. Step 6: Final answer
    x = 42,954.62

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1.5x scale

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.