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Finding the Fourth Proportional to 229,151.25, 316,230.89 and 128,551.41

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Solution

The fourth proportional to 229,151.25, 316,230.89 and 128,551.41 is: 177,402.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,151.25 : 316,230.89 = 128,551.41 : x
  2. Step 2: Convert to fraction form
    229,151.25/316,230.89 = 128,551.41/x
  3. Step 3: Cross multiply
    229,151.25x = 316,230.89 × 128,551.41
  4. Step 4: Simplify right side
    229,151.25x = 40,651,926,152.30
  5. Step 5: Solve for x
    x = 40,651,926,152.30/229,151.25
  6. Step 6: Final answer
    x = 177,402.16

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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.