Home / 311,985.20-468,053.40-90,369.20

Finding the Fourth Proportional to 311,985.20, 468,053.40 and 90,369.20

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Solution

The fourth proportional to 311,985.20, 468,053.40 and 90,369.20 is: 135,575.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,985.20 : 468,053.40 = 90,369.20 : x
  2. Step 2: Convert to fraction form
    311,985.20/468,053.40 = 90,369.20/x
  3. Step 3: Cross multiply
    311,985.20x = 468,053.40 × 90,369.20
  4. Step 4: Simplify right side
    311,985.20x = 42,297,611,315.28
  5. Step 5: Solve for x
    x = 42,297,611,315.28/311,985.20
  6. Step 6: Final answer
    x = 135,575.70

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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.