Home / 78,511.50-117,698.31-31,160.01

Finding the Fourth Proportional to 78,511.50, 117,698.31 and 31,160.01

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Solution

The fourth proportional to 78,511.50, 117,698.31 and 31,160.01 is: 46,712.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,511.50 : 117,698.31 = 31,160.01 : x
  2. Step 2: Convert to fraction form
    78,511.50/117,698.31 = 31,160.01/x
  3. Step 3: Cross multiply
    78,511.50x = 117,698.31 × 31,160.01
  4. Step 4: Simplify right side
    78,511.50x = 3,667,480,516.58
  5. Step 5: Solve for x
    x = 3,667,480,516.58/78,511.50
  6. Step 6: Final answer
    x = 46,712.65

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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.