Home / 142,329.28-196,424.58-78,665.70

Finding the Fourth Proportional to 142,329.28, 196,424.58 and 78,665.70

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Solution

The fourth proportional to 142,329.28, 196,424.58 and 78,665.70 is: 108,564.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,329.28 : 196,424.58 = 78,665.70 : x
  2. Step 2: Convert to fraction form
    142,329.28/196,424.58 = 78,665.70/x
  3. Step 3: Cross multiply
    142,329.28x = 196,424.58 × 78,665.70
  4. Step 4: Simplify right side
    142,329.28x = 15,451,877,082.91
  5. Step 5: Solve for x
    x = 15,451,877,082.91/142,329.28
  6. Step 6: Final answer
    x = 108,564.29

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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.