Home / 142,289.71-196,372.22-78,639.80

Finding the Fourth Proportional to 142,289.71, 196,372.22 and 78,639.80

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Solution

The fourth proportional to 142,289.71, 196,372.22 and 78,639.80 is: 108,529.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,289.71 : 196,372.22 = 78,639.80 : x
  2. Step 2: Convert to fraction form
    142,289.71/196,372.22 = 78,639.80/x
  3. Step 3: Cross multiply
    142,289.71x = 196,372.22 × 78,639.80
  4. Step 4: Simplify right side
    142,289.71x = 15,442,672,793.89
  5. Step 5: Solve for x
    x = 15,442,672,793.89/142,289.71
  6. Step 6: Final answer
    x = 108,529.80

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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.