Home / 142,080.42-196,070.03-78,418.21

Finding the Fourth Proportional to 142,080.42, 196,070.03 and 78,418.21

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Solution

The fourth proportional to 142,080.42, 196,070.03 and 78,418.21 is: 108,216.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,080.42 : 196,070.03 = 78,418.21 : x
  2. Step 2: Convert to fraction form
    142,080.42/196,070.03 = 78,418.21/x
  3. Step 3: Cross multiply
    142,080.42x = 196,070.03 × 78,418.21
  4. Step 4: Simplify right side
    142,080.42x = 15,375,460,787.25
  5. Step 5: Solve for x
    x = 15,375,460,787.25/142,080.42
  6. Step 6: Final answer
    x = 108,216.61

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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.