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Finding the Fourth Proportional to 247,307.98, 370,991.40 and 78,769.12

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Solution

The fourth proportional to 247,307.98, 370,991.40 and 78,769.12 is: 118,163.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,307.98 : 370,991.40 = 78,769.12 : x
  2. Step 2: Convert to fraction form
    247,307.98/370,991.40 = 78,769.12/x
  3. Step 3: Cross multiply
    247,307.98x = 370,991.40 × 78,769.12
  4. Step 4: Simplify right side
    247,307.98x = 29,222,666,105.57
  5. Step 5: Solve for x
    x = 29,222,666,105.57/247,307.98
  6. Step 6: Final answer
    x = 118,163.05

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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.