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Finding the Fourth Proportional to 121,667.81, 182,501.72 and 38,561.81

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Solution

The fourth proportional to 121,667.81, 182,501.72 and 38,561.81 is: 57,842.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,667.81 : 182,501.72 = 38,561.81 : x
  2. Step 2: Convert to fraction form
    121,667.81/182,501.72 = 38,561.81/x
  3. Step 3: Cross multiply
    121,667.81x = 182,501.72 × 38,561.81
  4. Step 4: Simplify right side
    121,667.81x = 7,037,597,203.97
  5. Step 5: Solve for x
    x = 7,037,597,203.97/121,667.81
  6. Step 6: Final answer
    x = 57,842.72

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1.5x scale

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.