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Finding the Fourth Proportional to 229,791, 317,111.58 and 129,189.72

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Solution

The fourth proportional to 229,791, 317,111.58 and 129,189.72 is: 178,281.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,791 : 317,111.58 = 129,189.72 : x
  2. Step 2: Convert to fraction form
    229,791/317,111.58 = 129,189.72/x
  3. Step 3: Cross multiply
    229,791x = 317,111.58 × 129,189.72
  4. Step 4: Simplify right side
    229,791x = 40,967,556,228.96
  5. Step 5: Solve for x
    x = 40,967,556,228.96/229,791
  6. Step 6: Final answer
    x = 178,281.81

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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.