Home / 78,083.47-117,173.39-30,690.25

Finding the Fourth Proportional to 78,083.47, 117,173.39 and 30,690.25

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Solution

The fourth proportional to 78,083.47, 117,173.39 and 30,690.25 is: 46,054.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,083.47 : 117,173.39 = 30,690.25 : x
  2. Step 2: Convert to fraction form
    78,083.47/117,173.39 = 30,690.25/x
  3. Step 3: Cross multiply
    78,083.47x = 117,173.39 × 30,690.25
  4. Step 4: Simplify right side
    78,083.47x = 3,596,080,416.24
  5. Step 5: Solve for x
    x = 3,596,080,416.24/78,083.47
  6. Step 6: Final answer
    x = 46,054.31

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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.