Home / 142,440.64-196,551.03-78,769.78

Finding the Fourth Proportional to 142,440.64, 196,551.03 and 78,769.78

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Solution

The fourth proportional to 142,440.64, 196,551.03 and 78,769.78 is: 108,692.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,440.64 : 196,551.03 = 78,769.78 : x
  2. Step 2: Convert to fraction form
    142,440.64/196,551.03 = 78,769.78/x
  3. Step 3: Cross multiply
    142,440.64x = 196,551.03 × 78,769.78
  4. Step 4: Simplify right side
    142,440.64x = 15,482,281,391.87
  5. Step 5: Solve for x
    x = 15,482,281,391.87/142,440.64
  6. Step 6: Final answer
    x = 108,692.87

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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.