Home / 142,039.92-196,014.96-78,377.76

Finding the Fourth Proportional to 142,039.92, 196,014.96 and 78,377.76

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Solution

The fourth proportional to 142,039.92, 196,014.96 and 78,377.76 is: 108,161.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,039.92 : 196,014.96 = 78,377.76 : x
  2. Step 2: Convert to fraction form
    142,039.92/196,014.96 = 78,377.76/x
  3. Step 3: Cross multiply
    142,039.92x = 196,014.96 × 78,377.76
  4. Step 4: Simplify right side
    142,039.92x = 15,363,213,491.29
  5. Step 5: Solve for x
    x = 15,363,213,491.29/142,039.92
  6. Step 6: Final answer
    x = 108,161.24

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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.