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Finding the Fourth Proportional to 43,611.60, 65,287.80 and 28,837.20

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Solution

The fourth proportional to 43,611.60, 65,287.80 and 28,837.20 is: 43,170.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,611.60 : 65,287.80 = 28,837.20 : x
  2. Step 2: Convert to fraction form
    43,611.60/65,287.80 = 28,837.20/x
  3. Step 3: Cross multiply
    43,611.60x = 65,287.80 × 28,837.20
  4. Step 4: Simplify right side
    43,611.60x = 1,882,717,346.16
  5. Step 5: Solve for x
    x = 1,882,717,346.16/43,611.60
  6. Step 6: Final answer
    x = 43,170.10

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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.