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Finding the Fourth Proportional to 128,076.73, 176,748.67 and 70,715.86

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Solution

The fourth proportional to 128,076.73, 176,748.67 and 70,715.86 is: 97,589.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,076.73 : 176,748.67 = 70,715.86 : x
  2. Step 2: Convert to fraction form
    128,076.73/176,748.67 = 70,715.86/x
  3. Step 3: Cross multiply
    128,076.73x = 176,748.67 × 70,715.86
  4. Step 4: Simplify right side
    128,076.73x = 12,498,934,202.91
  5. Step 5: Solve for x
    x = 12,498,934,202.91/128,076.73
  6. Step 6: Final answer
    x = 97,589.42

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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.