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Finding the Fourth Proportional to 128,900.68, 193,325.30 and 43,503.19

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Solution

The fourth proportional to 128,900.68, 193,325.30 and 43,503.19 is: 65,246.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,900.68 : 193,325.30 = 43,503.19 : x
  2. Step 2: Convert to fraction form
    128,900.68/193,325.30 = 43,503.19/x
  3. Step 3: Cross multiply
    128,900.68x = 193,325.30 × 43,503.19
  4. Step 4: Simplify right side
    128,900.68x = 8,410,266,720.01
  5. Step 5: Solve for x
    x = 8,410,266,720.01/128,900.68
  6. Step 6: Final answer
    x = 65,246.10

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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.