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Finding the Fourth Proportional to 229,490.88, 316,662.96 and 128,869.44

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Solution

The fourth proportional to 229,490.88, 316,662.96 and 128,869.44 is: 177,820.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,490.88 : 316,662.96 = 128,869.44 : x
  2. Step 2: Convert to fraction form
    229,490.88/316,662.96 = 128,869.44/x
  3. Step 3: Cross multiply
    229,490.88x = 316,662.96 × 128,869.44
  4. Step 4: Simplify right side
    229,490.88x = 40,808,178,323.94
  5. Step 5: Solve for x
    x = 40,808,178,323.94/229,490.88
  6. Step 6: Final answer
    x = 177,820.48

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1.5x scale

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.