Home / 313,020.31-469,538.55-85,317.80

Finding the Fourth Proportional to 313,020.31, 469,538.55 and 85,317.80

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Solution

The fourth proportional to 313,020.31, 469,538.55 and 85,317.80 is: 127,978.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,020.31 : 469,538.55 = 85,317.80 : x
  2. Step 2: Convert to fraction form
    313,020.31/469,538.55 = 85,317.80/x
  3. Step 3: Cross multiply
    313,020.31x = 469,538.55 × 85,317.80
  4. Step 4: Simplify right side
    313,020.31x = 40,059,994,927.34
  5. Step 5: Solve for x
    x = 40,059,994,927.34/313,020.31
  6. Step 6: Final answer
    x = 127,978.90

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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.