Home / 142,841.25-197,121.11-79,188.57

Finding the Fourth Proportional to 142,841.25, 197,121.11 and 79,188.57

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Solution

The fourth proportional to 142,841.25, 197,121.11 and 79,188.57 is: 109,280.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,841.25 : 197,121.11 = 79,188.57 : x
  2. Step 2: Convert to fraction form
    142,841.25/197,121.11 = 79,188.57/x
  3. Step 3: Cross multiply
    142,841.25x = 197,121.11 × 79,188.57
  4. Step 4: Simplify right side
    142,841.25x = 15,609,738,421.77
  5. Step 5: Solve for x
    x = 15,609,738,421.77/142,841.25
  6. Step 6: Final answer
    x = 109,280.33

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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.