Home / 85,868.88-128,777.09-59,385.08

Finding the Fourth Proportional to 85,868.88, 128,777.09 and 59,385.08

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Solution

The fourth proportional to 85,868.88, 128,777.09 and 59,385.08 is: 89,059.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,868.88 : 128,777.09 = 59,385.08 : x
  2. Step 2: Convert to fraction form
    85,868.88/128,777.09 = 59,385.08/x
  3. Step 3: Cross multiply
    85,868.88x = 128,777.09 × 59,385.08
  4. Step 4: Simplify right side
    85,868.88x = 7,647,436,851.01
  5. Step 5: Solve for x
    x = 7,647,436,851.01/85,868.88
  6. Step 6: Final answer
    x = 89,059.47

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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.