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Finding the Fourth Proportional to 130,308.73, 179,843 and 72,969.88

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Solution

The fourth proportional to 130,308.73, 179,843 and 72,969.88 is: 100,707.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,308.73 : 179,843 = 72,969.88 : x
  2. Step 2: Convert to fraction form
    130,308.73/179,843 = 72,969.88/x
  3. Step 3: Cross multiply
    130,308.73x = 179,843 × 72,969.88
  4. Step 4: Simplify right side
    130,308.73x = 13,123,122,128.84
  5. Step 5: Solve for x
    x = 13,123,122,128.84/130,308.73
  6. Step 6: Final answer
    x = 100,707.93

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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.