Home / 313,021.18-469,539.87-85,318.67

Finding the Fourth Proportional to 313,021.18, 469,539.87 and 85,318.67

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Solution

The fourth proportional to 313,021.18, 469,539.87 and 85,318.67 is: 127,980.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,021.18 : 469,539.87 = 85,318.67 : x
  2. Step 2: Convert to fraction form
    313,021.18/469,539.87 = 85,318.67/x
  3. Step 3: Cross multiply
    313,021.18x = 469,539.87 × 85,318.67
  4. Step 4: Simplify right side
    313,021.18x = 40,060,518,074.28
  5. Step 5: Solve for x
    x = 40,060,518,074.28/313,021.18
  6. Step 6: Final answer
    x = 127,980.21

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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.