Home / 78,489.03-108,316.22-42,679.28

Finding the Fourth Proportional to 78,489.03, 108,316.22 and 42,679.28

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Solution

The fourth proportional to 78,489.03, 108,316.22 and 42,679.28 is: 58,898.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,489.03 : 108,316.22 = 42,679.28 : x
  2. Step 2: Convert to fraction form
    78,489.03/108,316.22 = 42,679.28/x
  3. Step 3: Cross multiply
    78,489.03x = 108,316.22 × 42,679.28
  4. Step 4: Simplify right side
    78,489.03x = 4,622,857,526.94
  5. Step 5: Solve for x
    x = 4,622,857,526.94/78,489.03
  6. Step 6: Final answer
    x = 58,898.14

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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.