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Finding the Fourth Proportional to 120,220.89, 165,909.72 and 66,504.98

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Solution

The fourth proportional to 120,220.89, 165,909.72 and 66,504.98 is: 91,779.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,220.89 : 165,909.72 = 66,504.98 : x
  2. Step 2: Convert to fraction form
    120,220.89/165,909.72 = 66,504.98/x
  3. Step 3: Cross multiply
    120,220.89x = 165,909.72 × 66,504.98
  4. Step 4: Simplify right side
    120,220.89x = 11,033,822,610.41
  5. Step 5: Solve for x
    x = 11,033,822,610.41/120,220.89
  6. Step 6: Final answer
    x = 91,779.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.