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Finding the Fourth Proportional to 191,251.55, 286,614.88 and 121,005.11

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Solution

The fourth proportional to 191,251.55, 286,614.88 and 121,005.11 is: 181,341.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,251.55 : 286,614.88 = 121,005.11 : x
  2. Step 2: Convert to fraction form
    191,251.55/286,614.88 = 121,005.11/x
  3. Step 3: Cross multiply
    191,251.55x = 286,614.88 × 121,005.11
  4. Step 4: Simplify right side
    191,251.55x = 34,681,865,082.04
  5. Step 5: Solve for x
    x = 34,681,865,082.04/191,251.55
  6. Step 6: Final answer
    x = 181,341.62

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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.