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Finding the Fourth Proportional to 191,334.90, 287,111.70 and 73,091.10

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Solution

The fourth proportional to 191,334.90, 287,111.70 and 73,091.10 is: 109,678.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,334.90 : 287,111.70 = 73,091.10 : x
  2. Step 2: Convert to fraction form
    191,334.90/287,111.70 = 73,091.10/x
  3. Step 3: Cross multiply
    191,334.90x = 287,111.70 × 73,091.10
  4. Step 4: Simplify right side
    191,334.90x = 20,985,309,975.87
  5. Step 5: Solve for x
    x = 20,985,309,975.87/191,334.90
  6. Step 6: Final answer
    x = 109,678.42

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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.