Home / 103,018.21-154,503.07-28,120.55

Finding the Fourth Proportional to 103,018.21, 154,503.07 and 28,120.55

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Solution

The fourth proportional to 103,018.21, 154,503.07 and 28,120.55 is: 42,174.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,018.21 : 154,503.07 = 28,120.55 : x
  2. Step 2: Convert to fraction form
    103,018.21/154,503.07 = 28,120.55/x
  3. Step 3: Cross multiply
    103,018.21x = 154,503.07 × 28,120.55
  4. Step 4: Simplify right side
    103,018.21x = 4,344,710,462.27
  5. Step 5: Solve for x
    x = 4,344,710,462.27/103,018.21
  6. Step 6: Final answer
    x = 42,174.20

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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.