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Finding the Fourth Proportional to 229,485, 316,719 and 128,883

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Solution

The fourth proportional to 229,485, 316,719 and 128,883 is: 177,875.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,485 : 316,719 = 128,883 : x
  2. Step 2: Convert to fraction form
    229,485/316,719 = 128,883/x
  3. Step 3: Cross multiply
    229,485x = 316,719 × 128,883
  4. Step 4: Simplify right side
    229,485x = 40,819,694,877
  5. Step 5: Solve for x
    x = 40,819,694,877/229,485
  6. Step 6: Final answer
    x = 177,875.22

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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.