Home / 142,756.43-197,011.85-81,520.70

Finding the Fourth Proportional to 142,756.43, 197,011.85 and 81,520.70

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Solution

The fourth proportional to 142,756.43, 197,011.85 and 81,520.70 is: 112,503.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,756.43 : 197,011.85 = 81,520.70 : x
  2. Step 2: Convert to fraction form
    142,756.43/197,011.85 = 81,520.70/x
  3. Step 3: Cross multiply
    142,756.43x = 197,011.85 × 81,520.70
  4. Step 4: Simplify right side
    142,756.43x = 16,060,542,527.63
  5. Step 5: Solve for x
    x = 16,060,542,527.63/142,756.43
  6. Step 6: Final answer
    x = 112,503.12

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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.