Home / 77,990.34-117,008.19-28,069.54

Finding the Fourth Proportional to 77,990.34, 117,008.19 and 28,069.54

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Solution

The fourth proportional to 77,990.34, 117,008.19 and 28,069.54 is: 42,112.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,990.34 : 117,008.19 = 28,069.54 : x
  2. Step 2: Convert to fraction form
    77,990.34/117,008.19 = 28,069.54/x
  3. Step 3: Cross multiply
    77,990.34x = 117,008.19 × 28,069.54
  4. Step 4: Simplify right side
    77,990.34x = 3,284,366,069.53
  5. Step 5: Solve for x
    x = 3,284,366,069.53/77,990.34
  6. Step 6: Final answer
    x = 42,112.47

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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.