Home / 78,034.21-117,054.65-30,659.56

Finding the Fourth Proportional to 78,034.21, 117,054.65 and 30,659.56

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Solution

The fourth proportional to 78,034.21, 117,054.65 and 30,659.56 is: 45,990.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,034.21 : 117,054.65 = 30,659.56 : x
  2. Step 2: Convert to fraction form
    78,034.21/117,054.65 = 30,659.56/x
  3. Step 3: Cross multiply
    78,034.21x = 117,054.65 × 30,659.56
  4. Step 4: Simplify right side
    78,034.21x = 3,588,844,064.95
  5. Step 5: Solve for x
    x = 3,588,844,064.95/78,034.21
  6. Step 6: Final answer
    x = 45,990.65

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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.