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Finding the Fourth Proportional to 79,940.64, 110,331.54 and 76,397.76

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Solution

The fourth proportional to 79,940.64, 110,331.54 and 76,397.76 is: 105,441.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,940.64 : 110,331.54 = 76,397.76 : x
  2. Step 2: Convert to fraction form
    79,940.64/110,331.54 = 76,397.76/x
  3. Step 3: Cross multiply
    79,940.64x = 110,331.54 × 76,397.76
  4. Step 4: Simplify right side
    79,940.64x = 8,429,082,513.35
  5. Step 5: Solve for x
    x = 8,429,082,513.35/79,940.64
  6. Step 6: Final answer
    x = 105,441.77

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1.5x scale

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.