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Finding the Fourth Proportional to 191,520.96, 287,350.56 and 66,880.32

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Solution

The fourth proportional to 191,520.96, 287,350.56 and 66,880.32 is: 100,344.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,520.96 : 287,350.56 = 66,880.32 : x
  2. Step 2: Convert to fraction form
    191,520.96/287,350.56 = 66,880.32/x
  3. Step 3: Cross multiply
    191,520.96x = 287,350.56 × 66,880.32
  4. Step 4: Simplify right side
    191,520.96x = 19,218,097,404.98
  5. Step 5: Solve for x
    x = 19,218,097,404.98/191,520.96
  6. Step 6: Final answer
    x = 100,344.62

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1.5x scale

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.