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Finding the Fourth Proportional to 104,993.86, 157,335.21 and 86,405.98

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Solution

The fourth proportional to 104,993.86, 157,335.21 and 86,405.98 is: 129,480.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,993.86 : 157,335.21 = 86,405.98 : x
  2. Step 2: Convert to fraction form
    104,993.86/157,335.21 = 86,405.98/x
  3. Step 3: Cross multiply
    104,993.86x = 157,335.21 × 86,405.98
  4. Step 4: Simplify right side
    104,993.86x = 13,594,703,008.56
  5. Step 5: Solve for x
    x = 13,594,703,008.56/104,993.86
  6. Step 6: Final answer
    x = 129,480.93

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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.