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Finding the Fourth Proportional to 100,765.80, 151,265.10 and 54,109.80

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Solution

The fourth proportional to 100,765.80, 151,265.10 and 54,109.80 is: 81,227.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,765.80 : 151,265.10 = 54,109.80 : x
  2. Step 2: Convert to fraction form
    100,765.80/151,265.10 = 54,109.80/x
  3. Step 3: Cross multiply
    100,765.80x = 151,265.10 × 54,109.80
  4. Step 4: Simplify right side
    100,765.80x = 8,184,924,307.98
  5. Step 5: Solve for x
    x = 8,184,924,307.98/100,765.80
  6. Step 6: Final answer
    x = 81,227.21

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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.