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Finding the Fourth Proportional to 79,678.83, 109,954.65 and 43,869.12

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Solution

The fourth proportional to 79,678.83, 109,954.65 and 43,869.12 is: 60,538.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,678.83 : 109,954.65 = 43,869.12 : x
  2. Step 2: Convert to fraction form
    79,678.83/109,954.65 = 43,869.12/x
  3. Step 3: Cross multiply
    79,678.83x = 109,954.65 × 43,869.12
  4. Step 4: Simplify right side
    79,678.83x = 4,823,613,735.41
  5. Step 5: Solve for x
    x = 4,823,613,735.41/79,678.83
  6. Step 6: Final answer
    x = 60,538.21

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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.