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Finding the Fourth Proportional to 191,930.52, 287,772.56 and 79,688.20

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Solution

The fourth proportional to 191,930.52, 287,772.56 and 79,688.20 is: 119,481.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,930.52 : 287,772.56 = 79,688.20 : x
  2. Step 2: Convert to fraction form
    191,930.52/287,772.56 = 79,688.20/x
  3. Step 3: Cross multiply
    191,930.52x = 287,772.56 × 79,688.20
  4. Step 4: Simplify right side
    191,930.52x = 22,932,077,315.79
  5. Step 5: Solve for x
    x = 22,932,077,315.79/191,930.52
  6. Step 6: Final answer
    x = 119,481.14

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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.