Home / 78,247.80-117,342.21-28,315.56

Finding the Fourth Proportional to 78,247.80, 117,342.21 and 28,315.56

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Solution

The fourth proportional to 78,247.80, 117,342.21 and 28,315.56 is: 42,462.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,247.80 : 117,342.21 = 28,315.56 : x
  2. Step 2: Convert to fraction form
    78,247.80/117,342.21 = 28,315.56/x
  3. Step 3: Cross multiply
    78,247.80x = 117,342.21 × 28,315.56
  4. Step 4: Simplify right side
    78,247.80x = 3,322,610,387.79
  5. Step 5: Solve for x
    x = 3,322,610,387.79/78,247.80
  6. Step 6: Final answer
    x = 42,462.67

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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.