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Finding the Fourth Proportional to 191,286.12, 286,926.84 and 86,030.76

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Solution

The fourth proportional to 191,286.12, 286,926.84 and 86,030.76 is: 129,045.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,286.12 : 286,926.84 = 86,030.76 : x
  2. Step 2: Convert to fraction form
    191,286.12/286,926.84 = 86,030.76/x
  3. Step 3: Cross multiply
    191,286.12x = 286,926.84 × 86,030.76
  4. Step 4: Simplify right side
    191,286.12x = 24,684,534,109.60
  5. Step 5: Solve for x
    x = 24,684,534,109.60/191,286.12
  6. Step 6: Final answer
    x = 129,045.09

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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.