Home / 85,535,999.80-128,303,999.70-79,489,382.20

Finding the Fourth Proportional to 85,535,999.80, 128,303,999.70 and 79,489,382.20

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Solution

The fourth proportional to 85,535,999.80, 128,303,999.70 and 79,489,382.20 is: 119,234,073.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,535,999.80 : 128,303,999.70 = 79,489,382.20 : x
  2. Step 2: Convert to fraction form
    85,535,999.80/128,303,999.70 = 79,489,382.20/x
  3. Step 3: Cross multiply
    85,535,999.80x = 128,303,999.70 × 79,489,382.20
  4. Step 4: Simplify right side
    85,535,999.80x = 10,198,805,669,941,986
  5. Step 5: Solve for x
    x = 10,198,805,669,941,986/85,535,999.80
  6. Step 6: Final answer
    x = 119,234,073.30

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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.