Home / 127,340.57-175,682.31-78,920.39

Finding the Fourth Proportional to 127,340.57, 175,682.31 and 78,920.39

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Solution

The fourth proportional to 127,340.57, 175,682.31 and 78,920.39 is: 108,880.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,340.57 : 175,682.31 = 78,920.39 : x
  2. Step 2: Convert to fraction form
    127,340.57/175,682.31 = 78,920.39/x
  3. Step 3: Cross multiply
    127,340.57x = 175,682.31 × 78,920.39
  4. Step 4: Simplify right side
    127,340.57x = 13,864,916,421.30
  5. Step 5: Solve for x
    x = 13,864,916,421.30/127,340.57
  6. Step 6: Final answer
    x = 108,880.59

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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.