Home / 85,618.80-128,381.52-26,443.44

Finding the Fourth Proportional to 85,618.80, 128,381.52 and 26,443.44

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Solution

The fourth proportional to 85,618.80, 128,381.52 and 26,443.44 is: 39,650.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,618.80 : 128,381.52 = 26,443.44 : x
  2. Step 2: Convert to fraction form
    85,618.80/128,381.52 = 26,443.44/x
  3. Step 3: Cross multiply
    85,618.80x = 128,381.52 × 26,443.44
  4. Step 4: Simplify right side
    85,618.80x = 3,394,849,021.23
  5. Step 5: Solve for x
    x = 3,394,849,021.23/85,618.80
  6. Step 6: Final answer
    x = 39,650.74

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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.