Home / 142,339.05-196,420.19-78,672.75

Finding the Fourth Proportional to 142,339.05, 196,420.19 and 78,672.75

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Solution

The fourth proportional to 142,339.05, 196,420.19 and 78,672.75 is: 108,564.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,339.05 : 196,420.19 = 78,672.75 : x
  2. Step 2: Convert to fraction form
    142,339.05/196,420.19 = 78,672.75/x
  3. Step 3: Cross multiply
    142,339.05x = 196,420.19 × 78,672.75
  4. Step 4: Simplify right side
    142,339.05x = 15,452,916,109.46
  5. Step 5: Solve for x
    x = 15,452,916,109.46/142,339.05
  6. Step 6: Final answer
    x = 108,564.14

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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.