Home / 86,985.20-120,019.56-51,161.60

Finding the Fourth Proportional to 86,985.20, 120,019.56 and 51,161.60

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Solution

The fourth proportional to 86,985.20, 120,019.56 and 51,161.60 is: 70,591.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,985.20 : 120,019.56 = 51,161.60 : x
  2. Step 2: Convert to fraction form
    86,985.20/120,019.56 = 51,161.60/x
  3. Step 3: Cross multiply
    86,985.20x = 120,019.56 × 51,161.60
  4. Step 4: Simplify right side
    86,985.20x = 6,140,392,720.90
  5. Step 5: Solve for x
    x = 6,140,392,720.90/86,985.20
  6. Step 6: Final answer
    x = 70,591.24

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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.