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Finding the Fourth Proportional to 102,643.45, 154,048.11 and 43,520.64

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Solution

The fourth proportional to 102,643.45, 154,048.11 and 43,520.64 is: 65,316.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,643.45 : 154,048.11 = 43,520.64 : x
  2. Step 2: Convert to fraction form
    102,643.45/154,048.11 = 43,520.64/x
  3. Step 3: Cross multiply
    102,643.45x = 154,048.11 × 43,520.64
  4. Step 4: Simplify right side
    102,643.45x = 6,704,272,708.43
  5. Step 5: Solve for x
    x = 6,704,272,708.43/102,643.45
  6. Step 6: Final answer
    x = 65,316.13

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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.