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Finding the Fourth Proportional to 191,332.70, 286,999.05 and 121,291.10

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Solution

The fourth proportional to 191,332.70, 286,999.05 and 121,291.10 is: 181,936.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,332.70 : 286,999.05 = 121,291.10 : x
  2. Step 2: Convert to fraction form
    191,332.70/286,999.05 = 121,291.10/x
  3. Step 3: Cross multiply
    191,332.70x = 286,999.05 × 121,291.10
  4. Step 4: Simplify right side
    191,332.70x = 34,810,430,473.46
  5. Step 5: Solve for x
    x = 34,810,430,473.46/191,332.70
  6. Step 6: Final answer
    x = 181,936.65

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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.