Home / 142,655.27-196,861.87-78,991.70

Finding the Fourth Proportional to 142,655.27, 196,861.87 and 78,991.70

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Solution

The fourth proportional to 142,655.27, 196,861.87 and 78,991.70 is: 109,007.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,655.27 : 196,861.87 = 78,991.70 : x
  2. Step 2: Convert to fraction form
    142,655.27/196,861.87 = 78,991.70/x
  3. Step 3: Cross multiply
    142,655.27x = 196,861.87 × 78,991.70
  4. Step 4: Simplify right side
    142,655.27x = 15,550,453,381.52
  5. Step 5: Solve for x
    x = 15,550,453,381.52/142,655.27
  6. Step 6: Final answer
    x = 109,007.21

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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.