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Finding the Fourth Proportional to 70,929.03, 106,418.95 and 30,385.53

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Solution

The fourth proportional to 70,929.03, 106,418.95 and 30,385.53 is: 45,589.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,929.03 : 106,418.95 = 30,385.53 : x
  2. Step 2: Convert to fraction form
    70,929.03/106,418.95 = 30,385.53/x
  3. Step 3: Cross multiply
    70,929.03x = 106,418.95 × 30,385.53
  4. Step 4: Simplify right side
    70,929.03x = 3,233,596,121.83
  5. Step 5: Solve for x
    x = 3,233,596,121.83/70,929.03
  6. Step 6: Final answer
    x = 45,589.18

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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.