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Finding the Fourth Proportional to 86,777.80, 130,134.30 and 60,404.20

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Solution

The fourth proportional to 86,777.80, 130,134.30 and 60,404.20 is: 90,583.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,777.80 : 130,134.30 = 60,404.20 : x
  2. Step 2: Convert to fraction form
    86,777.80/130,134.30 = 60,404.20/x
  3. Step 3: Cross multiply
    86,777.80x = 130,134.30 × 60,404.20
  4. Step 4: Simplify right side
    86,777.80x = 7,860,658,284.06
  5. Step 5: Solve for x
    x = 7,860,658,284.06/86,777.80
  6. Step 6: Final answer
    x = 90,583.75

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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.