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Finding the Fourth Proportional to 85,079.50, 117,378.21 and 84,948.28

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Solution

The fourth proportional to 85,079.50, 117,378.21 and 84,948.28 is: 117,197.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,079.50 : 117,378.21 = 84,948.28 : x
  2. Step 2: Convert to fraction form
    85,079.50/117,378.21 = 84,948.28/x
  3. Step 3: Cross multiply
    85,079.50x = 117,378.21 × 84,948.28
  4. Step 4: Simplify right side
    85,079.50x = 9,971,077,074.09
  5. Step 5: Solve for x
    x = 9,971,077,074.09/85,079.50
  6. Step 6: Final answer
    x = 117,197.18

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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.