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Finding the Fourth Proportional to 176,120.78, 243,046.65 and 100,670.90

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Solution

The fourth proportional to 176,120.78, 243,046.65 and 100,670.90 is: 138,925.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    176,120.78 : 243,046.65 = 100,670.90 : x
  2. Step 2: Convert to fraction form
    176,120.78/243,046.65 = 100,670.90/x
  3. Step 3: Cross multiply
    176,120.78x = 243,046.65 × 100,670.90
  4. Step 4: Simplify right side
    176,120.78x = 24,467,724,997.49
  5. Step 5: Solve for x
    x = 24,467,724,997.49/176,120.78
  6. Step 6: Final answer
    x = 138,925.83

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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.