Home / 80,126.42-120,138.75-42,663.38

Finding the Fourth Proportional to 80,126.42, 120,138.75 and 42,663.38

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Solution

The fourth proportional to 80,126.42, 120,138.75 and 42,663.38 is: 63,967.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,126.42 : 120,138.75 = 42,663.38 : x
  2. Step 2: Convert to fraction form
    80,126.42/120,138.75 = 42,663.38/x
  3. Step 3: Cross multiply
    80,126.42x = 120,138.75 × 42,663.38
  4. Step 4: Simplify right side
    80,126.42x = 5,125,525,143.98
  5. Step 5: Solve for x
    x = 5,125,525,143.98/80,126.42
  6. Step 6: Final answer
    x = 63,967.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.