Home / 77,271.26-115,906.89-42,191.78

Finding the Fourth Proportional to 77,271.26, 115,906.89 and 42,191.78

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Solution

The fourth proportional to 77,271.26, 115,906.89 and 42,191.78 is: 63,287.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,271.26 : 115,906.89 = 42,191.78 : x
  2. Step 2: Convert to fraction form
    77,271.26/115,906.89 = 42,191.78/x
  3. Step 3: Cross multiply
    77,271.26x = 115,906.89 × 42,191.78
  4. Step 4: Simplify right side
    77,271.26x = 4,890,318,003.36
  5. Step 5: Solve for x
    x = 4,890,318,003.36/77,271.26
  6. Step 6: Final answer
    x = 63,287.67

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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.