Home / 78,433.55-108,236.87-42,623.68

Finding the Fourth Proportional to 78,433.55, 108,236.87 and 42,623.68

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Solution

The fourth proportional to 78,433.55, 108,236.87 and 42,623.68 is: 58,819.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,433.55 : 108,236.87 = 42,623.68 : x
  2. Step 2: Convert to fraction form
    78,433.55/108,236.87 = 42,623.68/x
  3. Step 3: Cross multiply
    78,433.55x = 108,236.87 × 42,623.68
  4. Step 4: Simplify right side
    78,433.55x = 4,613,453,711.08
  5. Step 5: Solve for x
    x = 4,613,453,711.08/78,433.55
  6. Step 6: Final answer
    x = 58,819.91

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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.