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Finding the Fourth Proportional to 118,103.70, 176,723.55 and 86,999.70

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Solution

The fourth proportional to 118,103.70, 176,723.55 and 86,999.70 is: 130,181.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,103.70 : 176,723.55 = 86,999.70 : x
  2. Step 2: Convert to fraction form
    118,103.70/176,723.55 = 86,999.70/x
  3. Step 3: Cross multiply
    118,103.70x = 176,723.55 × 86,999.70
  4. Step 4: Simplify right side
    118,103.70x = 15,374,895,832.94
  5. Step 5: Solve for x
    x = 15,374,895,832.94/118,103.70
  6. Step 6: Final answer
    x = 130,181.32

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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.