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Finding the Fourth Proportional to 80,645.36, 120,775.64 and 46,839.78

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Solution

The fourth proportional to 80,645.36, 120,775.64 and 46,839.78 is: 70,147.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,645.36 : 120,775.64 = 46,839.78 : x
  2. Step 2: Convert to fraction form
    80,645.36/120,775.64 = 46,839.78/x
  3. Step 3: Cross multiply
    80,645.36x = 120,775.64 × 46,839.78
  4. Step 4: Simplify right side
    80,645.36x = 5,657,104,172.76
  5. Step 5: Solve for x
    x = 5,657,104,172.76/80,645.36
  6. Step 6: Final answer
    x = 70,147.92

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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.