Home / 142,171.11-196,194.90-78,507.54

Finding the Fourth Proportional to 142,171.11, 196,194.90 and 78,507.54

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Solution

The fourth proportional to 142,171.11, 196,194.90 and 78,507.54 is: 108,339.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,171.11 : 196,194.90 = 78,507.54 : x
  2. Step 2: Convert to fraction form
    142,171.11/196,194.90 = 78,507.54/x
  3. Step 3: Cross multiply
    142,171.11x = 196,194.90 × 78,507.54
  4. Step 4: Simplify right side
    142,171.11x = 15,402,778,959.55
  5. Step 5: Solve for x
    x = 15,402,778,959.55/142,171.11
  6. Step 6: Final answer
    x = 108,339.72

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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.