Home / 86,998.90-120,060.58-51,190.78

Finding the Fourth Proportional to 86,998.90, 120,060.58 and 51,190.78

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Solution

The fourth proportional to 86,998.90, 120,060.58 and 51,190.78 is: 70,644.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,998.90 : 120,060.58 = 51,190.78 : x
  2. Step 2: Convert to fraction form
    86,998.90/120,060.58 = 51,190.78/x
  3. Step 3: Cross multiply
    86,998.90x = 120,060.58 × 51,190.78
  4. Step 4: Simplify right side
    86,998.90x = 6,145,994,737.45
  5. Step 5: Solve for x
    x = 6,145,994,737.45/86,998.90
  6. Step 6: Final answer
    x = 70,644.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.