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Finding the Fourth Proportional to 231,044.99, 318,838.57 and 129,071.91

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Solution

The fourth proportional to 231,044.99, 318,838.57 and 129,071.91 is: 178,117.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,044.99 : 318,838.57 = 129,071.91 : x
  2. Step 2: Convert to fraction form
    231,044.99/318,838.57 = 129,071.91/x
  3. Step 3: Cross multiply
    231,044.99x = 318,838.57 × 129,071.91
  4. Step 4: Simplify right side
    231,044.99x = 41,153,102,566.21
  5. Step 5: Solve for x
    x = 41,153,102,566.21/231,044.99
  6. Step 6: Final answer
    x = 178,117.27

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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.