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Finding the Fourth Proportional to 103,309.04, 154,943.12 and 28,409.86

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Solution

The fourth proportional to 103,309.04, 154,943.12 and 28,409.86 is: 42,609.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,309.04 : 154,943.12 = 28,409.86 : x
  2. Step 2: Convert to fraction form
    103,309.04/154,943.12 = 28,409.86/x
  3. Step 3: Cross multiply
    103,309.04x = 154,943.12 × 28,409.86
  4. Step 4: Simplify right side
    103,309.04x = 4,401,912,347.16
  5. Step 5: Solve for x
    x = 4,401,912,347.16/103,309.04
  6. Step 6: Final answer
    x = 42,609.17

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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.