Home / 80,749.64-121,140.66-28,145

Finding the Fourth Proportional to 80,749.64, 121,140.66 and 28,145

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Solution

The fourth proportional to 80,749.64, 121,140.66 and 28,145 is: 42,223.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,749.64 : 121,140.66 = 28,145 : x
  2. Step 2: Convert to fraction form
    80,749.64/121,140.66 = 28,145/x
  3. Step 3: Cross multiply
    80,749.64x = 121,140.66 × 28,145
  4. Step 4: Simplify right side
    80,749.64x = 3,409,503,875.70
  5. Step 5: Solve for x
    x = 3,409,503,875.70/80,749.64
  6. Step 6: Final answer
    x = 42,223.15

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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.