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Finding the Fourth Proportional to 229,300.44, 316,417.26 and 128,679

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Solution

The fourth proportional to 229,300.44, 316,417.26 and 128,679 is: 177,567.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,300.44 : 316,417.26 = 128,679 : x
  2. Step 2: Convert to fraction form
    229,300.44/316,417.26 = 128,679/x
  3. Step 3: Cross multiply
    229,300.44x = 316,417.26 × 128,679
  4. Step 4: Simplify right side
    229,300.44x = 40,716,256,599.54
  5. Step 5: Solve for x
    x = 40,716,256,599.54/229,300.44
  6. Step 6: Final answer
    x = 177,567.29

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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.