Home / 78,440.04-117,579.30-31,035.90

Finding the Fourth Proportional to 78,440.04, 117,579.30 and 31,035.90

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Solution

The fourth proportional to 78,440.04, 117,579.30 and 31,035.90 is: 46,521.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,440.04 : 117,579.30 = 31,035.90 : x
  2. Step 2: Convert to fraction form
    78,440.04/117,579.30 = 31,035.90/x
  3. Step 3: Cross multiply
    78,440.04x = 117,579.30 × 31,035.90
  4. Step 4: Simplify right side
    78,440.04x = 3,649,179,396.87
  5. Step 5: Solve for x
    x = 3,649,179,396.87/78,440.04
  6. Step 6: Final answer
    x = 46,521.90

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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.