Home / 86,100.12-128,772.48-76,678.92

Finding the Fourth Proportional to 86,100.12, 128,772.48 and 76,678.92

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Solution

The fourth proportional to 86,100.12, 128,772.48 and 76,678.92 is: 114,682.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,100.12 : 128,772.48 = 76,678.92 : x
  2. Step 2: Convert to fraction form
    86,100.12/128,772.48 = 76,678.92/x
  3. Step 3: Cross multiply
    86,100.12x = 128,772.48 × 76,678.92
  4. Step 4: Simplify right side
    86,100.12x = 9,874,134,692.12
  5. Step 5: Solve for x
    x = 9,874,134,692.12/86,100.12
  6. Step 6: Final answer
    x = 114,682.01

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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.