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Finding the Fourth Proportional to 135,645.60, 203,419.80 and 69,063.60

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Solution

The fourth proportional to 135,645.60, 203,419.80 and 69,063.60 is: 103,570.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,645.60 : 203,419.80 = 69,063.60 : x
  2. Step 2: Convert to fraction form
    135,645.60/203,419.80 = 69,063.60/x
  3. Step 3: Cross multiply
    135,645.60x = 203,419.80 × 69,063.60
  4. Step 4: Simplify right side
    135,645.60x = 14,048,903,699.28
  5. Step 5: Solve for x
    x = 14,048,903,699.28/135,645.60
  6. Step 6: Final answer
    x = 103,570.66

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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.