Home / 85,930,672.80-128,896,009.20-82,571,440.80

Finding the Fourth Proportional to 85,930,672.80, 128,896,009.20 and 82,571,440.80

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Solution

The fourth proportional to 85,930,672.80, 128,896,009.20 and 82,571,440.80 is: 123,857,161.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,930,672.80 : 128,896,009.20 = 82,571,440.80 : x
  2. Step 2: Convert to fraction form
    85,930,672.80/128,896,009.20 = 82,571,440.80/x
  3. Step 3: Cross multiply
    85,930,672.80x = 128,896,009.20 × 82,571,440.80
  4. Step 4: Simplify right side
    85,930,672.80x = 10,643,129,193,014,056
  5. Step 5: Solve for x
    x = 10,643,129,193,014,056/85,930,672.80
  6. Step 6: Final answer
    x = 123,857,161.20

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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.