Home / 139,140.22-192,013.56-78,709.58

Finding the Fourth Proportional to 139,140.22, 192,013.56 and 78,709.58

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Solution

The fourth proportional to 139,140.22, 192,013.56 and 78,709.58 is: 108,619.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,140.22 : 192,013.56 = 78,709.58 : x
  2. Step 2: Convert to fraction form
    139,140.22/192,013.56 = 78,709.58/x
  3. Step 3: Cross multiply
    139,140.22x = 192,013.56 × 78,709.58
  4. Step 4: Simplify right side
    139,140.22x = 15,113,306,661.90
  5. Step 5: Solve for x
    x = 15,113,306,661.90/139,140.22
  6. Step 6: Final answer
    x = 108,619.26

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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.