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Finding the Fourth Proportional to 90,322.80, 135,484.20 and 27,999.60

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Solution

The fourth proportional to 90,322.80, 135,484.20 and 27,999.60 is: 41,999.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,322.80 : 135,484.20 = 27,999.60 : x
  2. Step 2: Convert to fraction form
    90,322.80/135,484.20 = 27,999.60/x
  3. Step 3: Cross multiply
    90,322.80x = 135,484.20 × 27,999.60
  4. Step 4: Simplify right side
    90,322.80x = 3,793,503,406.32
  5. Step 5: Solve for x
    x = 3,793,503,406.32/90,322.80
  6. Step 6: Final answer
    x = 41,999.40

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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.