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Finding the Fourth Proportional to 424,668.68, 637,095.18 and 129,173

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Solution

The fourth proportional to 424,668.68, 637,095.18 and 129,173 is: 193,787.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,668.68 : 637,095.18 = 129,173 : x
  2. Step 2: Convert to fraction form
    424,668.68/637,095.18 = 129,173/x
  3. Step 3: Cross multiply
    424,668.68x = 637,095.18 × 129,173
  4. Step 4: Simplify right side
    424,668.68x = 82,295,495,686.14
  5. Step 5: Solve for x
    x = 82,295,495,686.14/424,668.68
  6. Step 6: Final answer
    x = 193,787.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.