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Finding the Fourth Proportional to 107,620.80, 161,488.80 and 45,297.60

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Solution

The fourth proportional to 107,620.80, 161,488.80 and 45,297.60 is: 67,970.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,620.80 : 161,488.80 = 45,297.60 : x
  2. Step 2: Convert to fraction form
    107,620.80/161,488.80 = 45,297.60/x
  3. Step 3: Cross multiply
    107,620.80x = 161,488.80 × 45,297.60
  4. Step 4: Simplify right side
    107,620.80x = 7,315,055,066.88
  5. Step 5: Solve for x
    x = 7,315,055,066.88/107,620.80
  6. Step 6: Final answer
    x = 67,970.64

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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.