Home / 142,187.84-196,218.56-78,525.36

Finding the Fourth Proportional to 142,187.84, 196,218.56 and 78,525.36

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Solution

The fourth proportional to 142,187.84, 196,218.56 and 78,525.36 is: 108,364.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,187.84 : 196,218.56 = 78,525.36 : x
  2. Step 2: Convert to fraction form
    142,187.84/196,218.56 = 78,525.36/x
  3. Step 3: Cross multiply
    142,187.84x = 196,218.56 × 78,525.36
  4. Step 4: Simplify right side
    142,187.84x = 15,408,133,062.68
  5. Step 5: Solve for x
    x = 15,408,133,062.68/142,187.84
  6. Step 6: Final answer
    x = 108,364.63

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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.