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Finding the Fourth Proportional to 103,770.40, 155,655.60 and 51,282.40

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Solution

The fourth proportional to 103,770.40, 155,655.60 and 51,282.40 is: 76,923.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,770.40 : 155,655.60 = 51,282.40 : x
  2. Step 2: Convert to fraction form
    103,770.40/155,655.60 = 51,282.40/x
  3. Step 3: Cross multiply
    103,770.40x = 155,655.60 × 51,282.40
  4. Step 4: Simplify right side
    103,770.40x = 7,982,392,741.44
  5. Step 5: Solve for x
    x = 7,982,392,741.44/103,770.40
  6. Step 6: Final answer
    x = 76,923.60

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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.