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Finding the Fourth Proportional to 103,307.20, 154,669.20 and 100,391.20

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Solution

The fourth proportional to 103,307.20, 154,669.20 and 100,391.20 is: 150,303.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,307.20 : 154,669.20 = 100,391.20 : x
  2. Step 2: Convert to fraction form
    103,307.20/154,669.20 = 100,391.20/x
  3. Step 3: Cross multiply
    103,307.20x = 154,669.20 × 100,391.20
  4. Step 4: Simplify right side
    103,307.20x = 15,527,426,591.04
  5. Step 5: Solve for x
    x = 15,527,426,591.04/103,307.20
  6. Step 6: Final answer
    x = 150,303.43

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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.