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Finding the Fourth Proportional to 90,611.80, 135,917.70 and 43,869.40

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Solution

The fourth proportional to 90,611.80, 135,917.70 and 43,869.40 is: 65,804.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,611.80 : 135,917.70 = 43,869.40 : x
  2. Step 2: Convert to fraction form
    90,611.80/135,917.70 = 43,869.40/x
  3. Step 3: Cross multiply
    90,611.80x = 135,917.70 × 43,869.40
  4. Step 4: Simplify right side
    90,611.80x = 5,962,627,948.38
  5. Step 5: Solve for x
    x = 5,962,627,948.38/90,611.80
  6. Step 6: Final answer
    x = 65,804.10

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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.