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Finding the Fourth Proportional to 118,649.56, 163,789.76 and 75,686.96

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Solution

The fourth proportional to 118,649.56, 163,789.76 and 75,686.96 is: 104,482.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,649.56 : 163,789.76 = 75,686.96 : x
  2. Step 2: Convert to fraction form
    118,649.56/163,789.76 = 75,686.96/x
  3. Step 3: Cross multiply
    118,649.56x = 163,789.76 × 75,686.96
  4. Step 4: Simplify right side
    118,649.56x = 12,396,749,013.53
  5. Step 5: Solve for x
    x = 12,396,749,013.53/118,649.56
  6. Step 6: Final answer
    x = 104,482.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.