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Finding the Fourth Proportional to 191,556.90, 287,365.73 and 65,209.05

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Solution

The fourth proportional to 191,556.90, 287,365.73 and 65,209.05 is: 97,823.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,556.90 : 287,365.73 = 65,209.05 : x
  2. Step 2: Convert to fraction form
    191,556.90/287,365.73 = 65,209.05/x
  3. Step 3: Cross multiply
    191,556.90x = 287,365.73 × 65,209.05
  4. Step 4: Simplify right side
    191,556.90x = 18,738,845,929.81
  5. Step 5: Solve for x
    x = 18,738,845,929.81/191,556.90
  6. Step 6: Final answer
    x = 97,823.92

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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.