Home / 142,027.12-195,998.52-78,364.72

Finding the Fourth Proportional to 142,027.12, 195,998.52 and 78,364.72

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Solution

The fourth proportional to 142,027.12, 195,998.52 and 78,364.72 is: 108,143.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,027.12 : 195,998.52 = 78,364.72 : x
  2. Step 2: Convert to fraction form
    142,027.12/195,998.52 = 78,364.72/x
  3. Step 3: Cross multiply
    142,027.12x = 195,998.52 × 78,364.72
  4. Step 4: Simplify right side
    142,027.12x = 15,359,369,140.21
  5. Step 5: Solve for x
    x = 15,359,369,140.21/142,027.12
  6. Step 6: Final answer
    x = 108,143.92

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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.