Home / 142,072.16-196,051.20-78,408.32

Finding the Fourth Proportional to 142,072.16, 196,051.20 and 78,408.32

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Solution

The fourth proportional to 142,072.16, 196,051.20 and 78,408.32 is: 108,198.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,072.16 : 196,051.20 = 78,408.32 : x
  2. Step 2: Convert to fraction form
    142,072.16/196,051.20 = 78,408.32/x
  3. Step 3: Cross multiply
    142,072.16x = 196,051.20 × 78,408.32
  4. Step 4: Simplify right side
    142,072.16x = 15,372,045,225.98
  5. Step 5: Solve for x
    x = 15,372,045,225.98/142,072.16
  6. Step 6: Final answer
    x = 108,198.86

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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.