Home / 142,856.42-197,144.08-78,331.55

Finding the Fourth Proportional to 142,856.42, 197,144.08 and 78,331.55

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Solution

The fourth proportional to 142,856.42, 197,144.08 and 78,331.55 is: 108,098.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,856.42 : 197,144.08 = 78,331.55 : x
  2. Step 2: Convert to fraction form
    142,856.42/197,144.08 = 78,331.55/x
  3. Step 3: Cross multiply
    142,856.42x = 197,144.08 × 78,331.55
  4. Step 4: Simplify right side
    142,856.42x = 15,442,601,208.37
  5. Step 5: Solve for x
    x = 15,442,601,208.37/142,856.42
  6. Step 6: Final answer
    x = 108,098.76

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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.