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Finding the Fourth Proportional to 191,109.30, 286,721.55 and 102,405.30

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Solution

The fourth proportional to 191,109.30, 286,721.55 and 102,405.30 is: 153,638.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,109.30 : 286,721.55 = 102,405.30 : x
  2. Step 2: Convert to fraction form
    191,109.30/286,721.55 = 102,405.30/x
  3. Step 3: Cross multiply
    191,109.30x = 286,721.55 × 102,405.30
  4. Step 4: Simplify right side
    191,109.30x = 29,361,806,344.22
  5. Step 5: Solve for x
    x = 29,361,806,344.22/191,109.30
  6. Step 6: Final answer
    x = 153,638.81

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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.