Home / 131,790.40-181,823.69-80,784.70

Finding the Fourth Proportional to 131,790.40, 181,823.69 and 80,784.70

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Solution

The fourth proportional to 131,790.40, 181,823.69 and 80,784.70 is: 111,454.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,790.40 : 181,823.69 = 80,784.70 : x
  2. Step 2: Convert to fraction form
    131,790.40/181,823.69 = 80,784.70/x
  3. Step 3: Cross multiply
    131,790.40x = 181,823.69 × 80,784.70
  4. Step 4: Simplify right side
    131,790.40x = 14,688,571,996.95
  5. Step 5: Solve for x
    x = 14,688,571,996.95/131,790.40
  6. Step 6: Final answer
    x = 111,454.04

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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.