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Finding the Fourth Proportional to 191,930.26, 287,772.18 and 79,687.95

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Solution

The fourth proportional to 191,930.26, 287,772.18 and 79,687.95 is: 119,480.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,930.26 : 287,772.18 = 79,687.95 : x
  2. Step 2: Convert to fraction form
    191,930.26/287,772.18 = 79,687.95/x
  3. Step 3: Cross multiply
    191,930.26x = 287,772.18 × 79,687.95
  4. Step 4: Simplify right side
    191,930.26x = 22,931,973,652.37
  5. Step 5: Solve for x
    x = 22,931,973,652.37/191,930.26
  6. Step 6: Final answer
    x = 119,480.76

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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.