Home / 139,376.15-192,354.44-78,128.20

Finding the Fourth Proportional to 139,376.15, 192,354.44 and 78,128.20

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Solution

The fourth proportional to 139,376.15, 192,354.44 and 78,128.20 is: 107,825.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,376.15 : 192,354.44 = 78,128.20 : x
  2. Step 2: Convert to fraction form
    139,376.15/192,354.44 = 78,128.20/x
  3. Step 3: Cross multiply
    139,376.15x = 192,354.44 × 78,128.20
  4. Step 4: Simplify right side
    139,376.15x = 15,028,306,159.21
  5. Step 5: Solve for x
    x = 15,028,306,159.21/139,376.15
  6. Step 6: Final answer
    x = 107,825.52

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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.