Home / 78,054.37-117,034.11-30,612.62

Finding the Fourth Proportional to 78,054.37, 117,034.11 and 30,612.62

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Solution

The fourth proportional to 78,054.37, 117,034.11 and 30,612.62 is: 45,900.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,054.37 : 117,034.11 = 30,612.62 : x
  2. Step 2: Convert to fraction form
    78,054.37/117,034.11 = 30,612.62/x
  3. Step 3: Cross multiply
    78,054.37x = 117,034.11 × 30,612.62
  4. Step 4: Simplify right side
    78,054.37x = 3,582,720,736.47
  5. Step 5: Solve for x
    x = 3,582,720,736.47/78,054.37
  6. Step 6: Final answer
    x = 45,900.32

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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.