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Finding the Fourth Proportional to 268,503.48, 402,698.48 and 78,912.41

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Solution

The fourth proportional to 268,503.48, 402,698.48 and 78,912.41 is: 118,351.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,503.48 : 402,698.48 = 78,912.41 : x
  2. Step 2: Convert to fraction form
    268,503.48/402,698.48 = 78,912.41/x
  3. Step 3: Cross multiply
    268,503.48x = 402,698.48 × 78,912.41
  4. Step 4: Simplify right side
    268,503.48x = 31,777,905,152.08
  5. Step 5: Solve for x
    x = 31,777,905,152.08/268,503.48
  6. Step 6: Final answer
    x = 118,351.93

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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.