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Finding the Fourth Proportional to 229,141.75, 316,217.78 and 128,541.91

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Solution

The fourth proportional to 229,141.75, 316,217.78 and 128,541.91 is: 177,389.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,141.75 : 316,217.78 = 128,541.91 : x
  2. Step 2: Convert to fraction form
    229,141.75/316,217.78 = 128,541.91/x
  3. Step 3: Cross multiply
    229,141.75x = 316,217.78 × 128,541.91
  4. Step 4: Simplify right side
    229,141.75x = 40,647,237,417.16
  5. Step 5: Solve for x
    x = 40,647,237,417.16/229,141.75
  6. Step 6: Final answer
    x = 177,389.05

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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.