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Finding the Fourth Proportional to 268,104.80, 402,211.20 and 78,564.80

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Solution

The fourth proportional to 268,104.80, 402,211.20 and 78,564.80 is: 117,863.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,104.80 : 402,211.20 = 78,564.80 : x
  2. Step 2: Convert to fraction form
    268,104.80/402,211.20 = 78,564.80/x
  3. Step 3: Cross multiply
    268,104.80x = 402,211.20 × 78,564.80
  4. Step 4: Simplify right side
    268,104.80x = 31,599,642,485.76
  5. Step 5: Solve for x
    x = 31,599,642,485.76/268,104.80
  6. Step 6: Final answer
    x = 117,863.02

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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.