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Finding the Fourth Proportional to 121,777.60, 168,047.80 and 66,585.91

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Solution

The fourth proportional to 121,777.60, 168,047.80 and 66,585.91 is: 91,885.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,777.60 : 168,047.80 = 66,585.91 : x
  2. Step 2: Convert to fraction form
    121,777.60/168,047.80 = 66,585.91/x
  3. Step 3: Cross multiply
    121,777.60x = 168,047.80 × 66,585.91
  4. Step 4: Simplify right side
    121,777.60x = 11,189,615,686.50
  5. Step 5: Solve for x
    x = 11,189,615,686.50/121,777.60
  6. Step 6: Final answer
    x = 91,885.67

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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.