Home / 78,054.78-117,082.18-18,890.46

Finding the Fourth Proportional to 78,054.78, 117,082.18 and 18,890.46

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Solution

The fourth proportional to 78,054.78, 117,082.18 and 18,890.46 is: 28,335.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,054.78 : 117,082.18 = 18,890.46 : x
  2. Step 2: Convert to fraction form
    78,054.78/117,082.18 = 18,890.46/x
  3. Step 3: Cross multiply
    78,054.78x = 117,082.18 × 18,890.46
  4. Step 4: Simplify right side
    78,054.78x = 2,211,736,238.00
  5. Step 5: Solve for x
    x = 2,211,736,238.00/78,054.78
  6. Step 6: Final answer
    x = 28,335.69

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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.