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Finding the Fourth Proportional to 191,619.54, 287,415.95 and 71,653.68

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Solution

The fourth proportional to 191,619.54, 287,415.95 and 71,653.68 is: 107,475.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,619.54 : 287,415.95 = 71,653.68 : x
  2. Step 2: Convert to fraction form
    191,619.54/287,415.95 = 71,653.68/x
  3. Step 3: Cross multiply
    191,619.54x = 287,415.95 × 71,653.68
  4. Step 4: Simplify right side
    191,619.54x = 20,594,410,149.93
  5. Step 5: Solve for x
    x = 20,594,410,149.93/191,619.54
  6. Step 6: Final answer
    x = 107,475.52

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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.