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Finding the Fourth Proportional to 229,885.72, 317,240.22 and 129,281.56

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Solution

The fourth proportional to 229,885.72, 317,240.22 and 129,281.56 is: 178,407.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,885.72 : 317,240.22 = 129,281.56 : x
  2. Step 2: Convert to fraction form
    229,885.72/317,240.22 = 129,281.56/x
  3. Step 3: Cross multiply
    229,885.72x = 317,240.22 × 129,281.56
  4. Step 4: Simplify right side
    229,885.72x = 41,013,310,536.34
  5. Step 5: Solve for x
    x = 41,013,310,536.34/229,885.72
  6. Step 6: Final answer
    x = 178,407.39

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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.