Home / 120,708.84-166,677.66-78,339.72

Finding the Fourth Proportional to 120,708.84, 166,677.66 and 78,339.72

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Solution

The fourth proportional to 120,708.84, 166,677.66 and 78,339.72 is: 108,173.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,708.84 : 166,677.66 = 78,339.72 : x
  2. Step 2: Convert to fraction form
    120,708.84/166,677.66 = 78,339.72/x
  3. Step 3: Cross multiply
    120,708.84x = 166,677.66 × 78,339.72
  4. Step 4: Simplify right side
    120,708.84x = 13,057,481,214.66
  5. Step 5: Solve for x
    x = 13,057,481,214.66/120,708.84
  6. Step 6: Final answer
    x = 108,173.36

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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.