Home / 129,514.65-178,730.06-72,926.43

Finding the Fourth Proportional to 129,514.65, 178,730.06 and 72,926.43

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Solution

The fourth proportional to 129,514.65, 178,730.06 and 72,926.43 is: 100,638.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,514.65 : 178,730.06 = 72,926.43 : x
  2. Step 2: Convert to fraction form
    129,514.65/178,730.06 = 72,926.43/x
  3. Step 3: Cross multiply
    129,514.65x = 178,730.06 × 72,926.43
  4. Step 4: Simplify right side
    129,514.65x = 13,034,144,844.85
  5. Step 5: Solve for x
    x = 13,034,144,844.85/129,514.65
  6. Step 6: Final answer
    x = 100,638.38

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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.