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Finding the Fourth Proportional to 101,420.80, 152,131.20 and 68,243.20

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Solution

The fourth proportional to 101,420.80, 152,131.20 and 68,243.20 is: 102,364.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,420.80 : 152,131.20 = 68,243.20 : x
  2. Step 2: Convert to fraction form
    101,420.80/152,131.20 = 68,243.20/x
  3. Step 3: Cross multiply
    101,420.80x = 152,131.20 × 68,243.20
  4. Step 4: Simplify right side
    101,420.80x = 10,381,919,907.84
  5. Step 5: Solve for x
    x = 10,381,919,907.84/101,420.80
  6. Step 6: Final answer
    x = 102,364.80

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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.