Home / 142,328.28-196,423.20-78,664.70

Finding the Fourth Proportional to 142,328.28, 196,423.20 and 78,664.70

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Solution

The fourth proportional to 142,328.28, 196,423.20 and 78,664.70 is: 108,562.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,328.28 : 196,423.20 = 78,664.70 : x
  2. Step 2: Convert to fraction form
    142,328.28/196,423.20 = 78,664.70/x
  3. Step 3: Cross multiply
    142,328.28x = 196,423.20 × 78,664.70
  4. Step 4: Simplify right side
    142,328.28x = 15,451,572,101.04
  5. Step 5: Solve for x
    x = 15,451,572,101.04/142,328.28
  6. Step 6: Final answer
    x = 108,562.91

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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.