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Finding the Fourth Proportional to 191,391.80, 287,193.42 and 79,045.88

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Solution

The fourth proportional to 191,391.80, 287,193.42 and 79,045.88 is: 118,612.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,391.80 : 287,193.42 = 79,045.88 : x
  2. Step 2: Convert to fraction form
    191,391.80/287,193.42 = 79,045.88/x
  3. Step 3: Cross multiply
    191,391.80x = 287,193.42 × 79,045.88
  4. Step 4: Simplify right side
    191,391.80x = 22,701,455,178.14
  5. Step 5: Solve for x
    x = 22,701,455,178.14/191,391.80
  6. Step 6: Final answer
    x = 118,612.48

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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.