Home / 129,636.55-178,981.02-105,819.85

Finding the Fourth Proportional to 129,636.55, 178,981.02 and 105,819.85

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Solution

The fourth proportional to 129,636.55, 178,981.02 and 105,819.85 is: 146,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,636.55 : 178,981.02 = 105,819.85 : x
  2. Step 2: Convert to fraction form
    129,636.55/178,981.02 = 105,819.85/x
  3. Step 3: Cross multiply
    129,636.55x = 178,981.02 × 105,819.85
  4. Step 4: Simplify right side
    129,636.55x = 18,939,744,689.25
  5. Step 5: Solve for x
    x = 18,939,744,689.25/129,636.55
  6. Step 6: Final answer
    x = 146,098.80

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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.