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Finding the Fourth Proportional to 128,066.78, 192,050.90 and 88,503.94

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Solution

The fourth proportional to 128,066.78, 192,050.90 and 88,503.94 is: 132,721.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,066.78 : 192,050.90 = 88,503.94 : x
  2. Step 2: Convert to fraction form
    128,066.78/192,050.90 = 88,503.94/x
  3. Step 3: Cross multiply
    128,066.78x = 192,050.90 × 88,503.94
  4. Step 4: Simplify right side
    128,066.78x = 16,997,261,330.55
  5. Step 5: Solve for x
    x = 16,997,261,330.55/128,066.78
  6. Step 6: Final answer
    x = 132,721.86

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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.