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Finding the Fourth Proportional to 191,859.22, 287,886.03 and 129,398.50

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Solution

The fourth proportional to 191,859.22, 287,886.03 and 129,398.50 is: 194,163.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,859.22 : 287,886.03 = 129,398.50 : x
  2. Step 2: Convert to fraction form
    191,859.22/287,886.03 = 129,398.50/x
  3. Step 3: Cross multiply
    191,859.22x = 287,886.03 × 129,398.50
  4. Step 4: Simplify right side
    191,859.22x = 37,252,020,452.96
  5. Step 5: Solve for x
    x = 37,252,020,452.96/191,859.22
  6. Step 6: Final answer
    x = 194,163.31

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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.