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Finding the Fourth Proportional to 126,241.68, 189,218.64 and 78,878.64

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Solution

The fourth proportional to 126,241.68, 189,218.64 and 78,878.64 is: 118,228.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,241.68 : 189,218.64 = 78,878.64 : x
  2. Step 2: Convert to fraction form
    126,241.68/189,218.64 = 78,878.64/x
  3. Step 3: Cross multiply
    126,241.68x = 189,218.64 × 78,878.64
  4. Step 4: Simplify right side
    126,241.68x = 14,925,308,985.85
  5. Step 5: Solve for x
    x = 14,925,308,985.85/126,241.68
  6. Step 6: Final answer
    x = 118,228.06

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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.