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Finding the Fourth Proportional to 121,779.60, 168,050.56 and 66,587.92

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Solution

The fourth proportional to 121,779.60, 168,050.56 and 66,587.92 is: 91,888.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,779.60 : 168,050.56 = 66,587.92 : x
  2. Step 2: Convert to fraction form
    121,779.60/168,050.56 = 66,587.92/x
  3. Step 3: Cross multiply
    121,779.60x = 168,050.56 × 66,587.92
  4. Step 4: Simplify right side
    121,779.60x = 11,190,137,245.24
  5. Step 5: Solve for x
    x = 11,190,137,245.24/121,779.60
  6. Step 6: Final answer
    x = 91,888.44

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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.