Home / 81,279.29-111,916.19-71,151.05

Finding the Fourth Proportional to 81,279.29, 111,916.19 and 71,151.05

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Solution

The fourth proportional to 81,279.29, 111,916.19 and 71,151.05 is: 97,970.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,279.29 : 111,916.19 = 71,151.05 : x
  2. Step 2: Convert to fraction form
    81,279.29/111,916.19 = 71,151.05/x
  3. Step 3: Cross multiply
    81,279.29x = 111,916.19 × 71,151.05
  4. Step 4: Simplify right side
    81,279.29x = 7,962,953,515.16
  5. Step 5: Solve for x
    x = 7,962,953,515.16/81,279.29
  6. Step 6: Final answer
    x = 97,970.27

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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.