Home / 142,063.88-196,052.40-78,405.77

Finding the Fourth Proportional to 142,063.88, 196,052.40 and 78,405.77

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Solution

The fourth proportional to 142,063.88, 196,052.40 and 78,405.77 is: 108,202.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,063.88 : 196,052.40 = 78,405.77 : x
  2. Step 2: Convert to fraction form
    142,063.88/196,052.40 = 78,405.77/x
  3. Step 3: Cross multiply
    142,063.88x = 196,052.40 × 78,405.77
  4. Step 4: Simplify right side
    142,063.88x = 15,371,639,872.48
  5. Step 5: Solve for x
    x = 15,371,639,872.48/142,063.88
  6. Step 6: Final answer
    x = 108,202.31

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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.