Home / 80,302.75-120,407.43-30,386.70

Finding the Fourth Proportional to 80,302.75, 120,407.43 and 30,386.70

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Solution

The fourth proportional to 80,302.75, 120,407.43 and 30,386.70 is: 45,562.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,302.75 : 120,407.43 = 30,386.70 : x
  2. Step 2: Convert to fraction form
    80,302.75/120,407.43 = 30,386.70/x
  3. Step 3: Cross multiply
    80,302.75x = 120,407.43 × 30,386.70
  4. Step 4: Simplify right side
    80,302.75x = 3,658,784,453.18
  5. Step 5: Solve for x
    x = 3,658,784,453.18/80,302.75
  6. Step 6: Final answer
    x = 45,562.38

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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.