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Finding the Fourth Proportional to 85,968.80, 129,000.28 and 33,380.36

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Solution

The fourth proportional to 85,968.80, 129,000.28 and 33,380.36 is: 50,088.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968.80 : 129,000.28 = 33,380.36 : x
  2. Step 2: Convert to fraction form
    85,968.80/129,000.28 = 33,380.36/x
  3. Step 3: Cross multiply
    85,968.80x = 129,000.28 × 33,380.36
  4. Step 4: Simplify right side
    85,968.80x = 4,306,075,786.50
  5. Step 5: Solve for x
    x = 4,306,075,786.50/85,968.80
  6. Step 6: Final answer
    x = 50,088.82

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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.