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Finding the Fourth Proportional to 185,978.76, 278,810.94 and 80,718.60

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Solution

The fourth proportional to 185,978.76, 278,810.94 and 80,718.60 is: 121,009.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,978.76 : 278,810.94 = 80,718.60 : x
  2. Step 2: Convert to fraction form
    185,978.76/278,810.94 = 80,718.60/x
  3. Step 3: Cross multiply
    185,978.76x = 278,810.94 × 80,718.60
  4. Step 4: Simplify right side
    185,978.76x = 22,505,228,741.48
  5. Step 5: Solve for x
    x = 22,505,228,741.48/185,978.76
  6. Step 6: Final answer
    x = 121,009.67

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.