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Finding the Fourth Proportional to 191,995.20, 287,992.80 and 109,051.20

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Solution

The fourth proportional to 191,995.20, 287,992.80 and 109,051.20 is: 163,576.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,995.20 : 287,992.80 = 109,051.20 : x
  2. Step 2: Convert to fraction form
    191,995.20/287,992.80 = 109,051.20/x
  3. Step 3: Cross multiply
    191,995.20x = 287,992.80 × 109,051.20
  4. Step 4: Simplify right side
    191,995.20x = 31,405,960,431.36
  5. Step 5: Solve for x
    x = 31,405,960,431.36/191,995.20
  6. Step 6: Final answer
    x = 163,576.80

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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.