Home / 77,986.50-107,621.39-42,176.51

Finding the Fourth Proportional to 77,986.50, 107,621.39 and 42,176.51

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Solution

The fourth proportional to 77,986.50, 107,621.39 and 42,176.51 is: 58,203.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,986.50 : 107,621.39 = 42,176.51 : x
  2. Step 2: Convert to fraction form
    77,986.50/107,621.39 = 42,176.51/x
  3. Step 3: Cross multiply
    77,986.50x = 107,621.39 × 42,176.51
  4. Step 4: Simplify right side
    77,986.50x = 4,539,093,882.56
  5. Step 5: Solve for x
    x = 4,539,093,882.56/77,986.50
  6. Step 6: Final answer
    x = 58,203.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.