Home / 129,636.05-178,980.32-105,819.35

Finding the Fourth Proportional to 129,636.05, 178,980.32 and 105,819.35

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Solution

The fourth proportional to 129,636.05, 178,980.32 and 105,819.35 is: 146,098.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,636.05 : 178,980.32 = 105,819.35 : x
  2. Step 2: Convert to fraction form
    129,636.05/178,980.32 = 105,819.35/x
  3. Step 3: Cross multiply
    129,636.05x = 178,980.32 × 105,819.35
  4. Step 4: Simplify right side
    129,636.05x = 18,939,581,125.19
  5. Step 5: Solve for x
    x = 18,939,581,125.19/129,636.05
  6. Step 6: Final answer
    x = 146,098.10

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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.