Home / 81,000.20-121,500.30-45,570.80

Finding the Fourth Proportional to 81,000.20, 121,500.30 and 45,570.80

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Solution

The fourth proportional to 81,000.20, 121,500.30 and 45,570.80 is: 68,356.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.20 : 121,500.30 = 45,570.80 : x
  2. Step 2: Convert to fraction form
    81,000.20/121,500.30 = 45,570.80/x
  3. Step 3: Cross multiply
    81,000.20x = 121,500.30 × 45,570.80
  4. Step 4: Simplify right side
    81,000.20x = 5,536,865,871.24
  5. Step 5: Solve for x
    x = 5,536,865,871.24/81,000.20
  6. Step 6: Final answer
    x = 68,356.20

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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.