Home / 311,981.20-468,047.40-90,365.20

Finding the Fourth Proportional to 311,981.20, 468,047.40 and 90,365.20

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Solution

The fourth proportional to 311,981.20, 468,047.40 and 90,365.20 is: 135,569.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,981.20 : 468,047.40 = 90,365.20 : x
  2. Step 2: Convert to fraction form
    311,981.20/468,047.40 = 90,365.20/x
  3. Step 3: Cross multiply
    311,981.20x = 468,047.40 × 90,365.20
  4. Step 4: Simplify right side
    311,981.20x = 42,295,196,910.48
  5. Step 5: Solve for x
    x = 42,295,196,910.48/311,981.20
  6. Step 6: Final answer
    x = 135,569.70

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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.