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Finding the Fourth Proportional to 268,168.80, 402,307.20 and 78,628.80

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Solution

The fourth proportional to 268,168.80, 402,307.20 and 78,628.80 is: 117,959.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,168.80 : 402,307.20 = 78,628.80 : x
  2. Step 2: Convert to fraction form
    268,168.80/402,307.20 = 78,628.80/x
  3. Step 3: Cross multiply
    268,168.80x = 402,307.20 × 78,628.80
  4. Step 4: Simplify right side
    268,168.80x = 31,632,932,367.36
  5. Step 5: Solve for x
    x = 31,632,932,367.36/268,168.80
  6. Step 6: Final answer
    x = 117,959.03

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1.5x scale

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.