Home / 100,861.20-151,291.80-99,111.60

Finding the Fourth Proportional to 100,861.20, 151,291.80 and 99,111.60

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Solution

The fourth proportional to 100,861.20, 151,291.80 and 99,111.60 is: 148,667.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,861.20 : 151,291.80 = 99,111.60 : x
  2. Step 2: Convert to fraction form
    100,861.20/151,291.80 = 99,111.60/x
  3. Step 3: Cross multiply
    100,861.20x = 151,291.80 × 99,111.60
  4. Step 4: Simplify right side
    100,861.20x = 14,994,772,364.88
  5. Step 5: Solve for x
    x = 14,994,772,364.88/100,861.20
  6. Step 6: Final answer
    x = 148,667.40

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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.