Home / 78,043.06-117,069.48-31,289.86

Finding the Fourth Proportional to 78,043.06, 117,069.48 and 31,289.86

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Solution

The fourth proportional to 78,043.06, 117,069.48 and 31,289.86 is: 46,936.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,043.06 : 117,069.48 = 31,289.86 : x
  2. Step 2: Convert to fraction form
    78,043.06/117,069.48 = 31,289.86/x
  3. Step 3: Cross multiply
    78,043.06x = 117,069.48 × 31,289.86
  4. Step 4: Simplify right side
    78,043.06x = 3,663,087,639.47
  5. Step 5: Solve for x
    x = 3,663,087,639.47/78,043.06
  6. Step 6: Final answer
    x = 46,936.75

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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.