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Finding the Fourth Proportional to 85,457.16, 117,863.64 and 79,727.63

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Solution

The fourth proportional to 85,457.16, 117,863.64 and 79,727.63 is: 109,961.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,457.16 : 117,863.64 = 79,727.63 : x
  2. Step 2: Convert to fraction form
    85,457.16/117,863.64 = 79,727.63/x
  3. Step 3: Cross multiply
    85,457.16x = 117,863.64 × 79,727.63
  4. Step 4: Simplify right side
    85,457.16x = 9,396,988,091.06
  5. Step 5: Solve for x
    x = 9,396,988,091.06/85,457.16
  6. Step 6: Final answer
    x = 109,961.39

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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.