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Finding the Fourth Proportional to 66,765.69, 100,070.64 and 54,308.03

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Solution

The fourth proportional to 66,765.69, 100,070.64 and 54,308.03 is: 81,398.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,765.69 : 100,070.64 = 54,308.03 : x
  2. Step 2: Convert to fraction form
    66,765.69/100,070.64 = 54,308.03/x
  3. Step 3: Cross multiply
    66,765.69x = 100,070.64 × 54,308.03
  4. Step 4: Simplify right side
    66,765.69x = 5,434,638,818.89
  5. Step 5: Solve for x
    x = 5,434,638,818.89/66,765.69
  6. Step 6: Final answer
    x = 81,398.68

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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.