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Finding the Fourth Proportional to 127,989.54, 176,624.36 and 70,629.39

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Solution

The fourth proportional to 127,989.54, 176,624.36 and 70,629.39 is: 97,467.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,989.54 : 176,624.36 = 70,629.39 : x
  2. Step 2: Convert to fraction form
    127,989.54/176,624.36 = 70,629.39/x
  3. Step 3: Cross multiply
    127,989.54x = 176,624.36 × 70,629.39
  4. Step 4: Simplify right side
    127,989.54x = 12,474,871,313.73
  5. Step 5: Solve for x
    x = 12,474,871,313.73/127,989.54
  6. Step 6: Final answer
    x = 97,467.89

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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.