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Finding the Fourth Proportional to 191,253.61, 286,617.97 and 121,007.17

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Solution

The fourth proportional to 191,253.61, 286,617.97 and 121,007.17 is: 181,344.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,253.61 : 286,617.97 = 121,007.17 : x
  2. Step 2: Convert to fraction form
    191,253.61/286,617.97 = 121,007.17/x
  3. Step 3: Cross multiply
    191,253.61x = 286,617.97 × 121,007.17
  4. Step 4: Simplify right side
    191,253.61x = 34,682,829,420.84
  5. Step 5: Solve for x
    x = 34,682,829,420.84/191,253.61
  6. Step 6: Final answer
    x = 181,344.70

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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.