Home / 78,279.59-117,581.11-74,868.39

Finding the Fourth Proportional to 78,279.59, 117,581.11 and 74,868.39

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Solution

The fourth proportional to 78,279.59, 117,581.11 and 74,868.39 is: 112,457.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,279.59 : 117,581.11 = 74,868.39 : x
  2. Step 2: Convert to fraction form
    78,279.59/117,581.11 = 74,868.39/x
  3. Step 3: Cross multiply
    78,279.59x = 117,581.11 × 74,868.39
  4. Step 4: Simplify right side
    78,279.59x = 8,803,108,212.94
  5. Step 5: Solve for x
    x = 8,803,108,212.94/78,279.59
  6. Step 6: Final answer
    x = 112,457.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.