Home / 78,723.57-118,102.20-28,803.48

Finding the Fourth Proportional to 78,723.57, 118,102.20 and 28,803.48

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Solution

The fourth proportional to 78,723.57, 118,102.20 and 28,803.48 is: 43,211.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,723.57 : 118,102.20 = 28,803.48 : x
  2. Step 2: Convert to fraction form
    78,723.57/118,102.20 = 28,803.48/x
  3. Step 3: Cross multiply
    78,723.57x = 118,102.20 × 28,803.48
  4. Step 4: Simplify right side
    78,723.57x = 3,401,754,355.66
  5. Step 5: Solve for x
    x = 3,401,754,355.66/78,723.57
  6. Step 6: Final answer
    x = 43,211.38

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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.