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Finding the Fourth Proportional to 90,319.38, 135,483.39 and 43,611.54

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Solution

The fourth proportional to 90,319.38, 135,483.39 and 43,611.54 is: 65,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,319.38 : 135,483.39 = 43,611.54 : x
  2. Step 2: Convert to fraction form
    90,319.38/135,483.39 = 43,611.54/x
  3. Step 3: Cross multiply
    90,319.38x = 135,483.39 × 43,611.54
  4. Step 4: Simplify right side
    90,319.38x = 5,908,639,282.32
  5. Step 5: Solve for x
    x = 5,908,639,282.32/90,319.38
  6. Step 6: Final answer
    x = 65,419.40

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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.