Home / 78,015.56-117,028.20-31,262.36

Finding the Fourth Proportional to 78,015.56, 117,028.20 and 31,262.36

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Solution

The fourth proportional to 78,015.56, 117,028.20 and 31,262.36 is: 46,895.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.56 : 117,028.20 = 31,262.36 : x
  2. Step 2: Convert to fraction form
    78,015.56/117,028.20 = 31,262.36/x
  3. Step 3: Cross multiply
    78,015.56x = 117,028.20 × 31,262.36
  4. Step 4: Simplify right side
    78,015.56x = 3,658,577,718.55
  5. Step 5: Solve for x
    x = 3,658,577,718.55/78,015.56
  6. Step 6: Final answer
    x = 46,895.49

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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.