Home / 136,968.72-189,035.64-78,824.27

Finding the Fourth Proportional to 136,968.72, 189,035.64 and 78,824.27

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Solution

The fourth proportional to 136,968.72, 189,035.64 and 78,824.27 is: 108,788.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,968.72 : 189,035.64 = 78,824.27 : x
  2. Step 2: Convert to fraction form
    136,968.72/189,035.64 = 78,824.27/x
  3. Step 3: Cross multiply
    136,968.72x = 189,035.64 × 78,824.27
  4. Step 4: Simplify right side
    136,968.72x = 14,900,595,381.80
  5. Step 5: Solve for x
    x = 14,900,595,381.80/136,968.72
  6. Step 6: Final answer
    x = 108,788.31

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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.