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Finding the Fourth Proportional to 135,985.60, 203,978.40 and 104,881.60

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Solution

The fourth proportional to 135,985.60, 203,978.40 and 104,881.60 is: 157,322.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,985.60 : 203,978.40 = 104,881.60 : x
  2. Step 2: Convert to fraction form
    135,985.60/203,978.40 = 104,881.60/x
  3. Step 3: Cross multiply
    135,985.60x = 203,978.40 × 104,881.60
  4. Step 4: Simplify right side
    135,985.60x = 21,393,580,957.44
  5. Step 5: Solve for x
    x = 21,393,580,957.44/135,985.60
  6. Step 6: Final answer
    x = 157,322.40

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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.