Home / 85,674.20-128,453.70-45,699.80

Finding the Fourth Proportional to 85,674.20, 128,453.70 and 45,699.80

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Solution

The fourth proportional to 85,674.20, 128,453.70 and 45,699.80 is: 68,518.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,674.20 : 128,453.70 = 45,699.80 : x
  2. Step 2: Convert to fraction form
    85,674.20/128,453.70 = 45,699.80/x
  3. Step 3: Cross multiply
    85,674.20x = 128,453.70 × 45,699.80
  4. Step 4: Simplify right side
    85,674.20x = 5,870,308,399.26
  5. Step 5: Solve for x
    x = 5,870,308,399.26/85,674.20
  6. Step 6: Final answer
    x = 68,518.98

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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.