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Finding the Fourth Proportional to 102,665.40, 154,019.70 and 43,470.60

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Solution

The fourth proportional to 102,665.40, 154,019.70 and 43,470.60 is: 65,215.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,665.40 : 154,019.70 = 43,470.60 : x
  2. Step 2: Convert to fraction form
    102,665.40/154,019.70 = 43,470.60/x
  3. Step 3: Cross multiply
    102,665.40x = 154,019.70 × 43,470.60
  4. Step 4: Simplify right side
    102,665.40x = 6,695,328,770.82
  5. Step 5: Solve for x
    x = 6,695,328,770.82/102,665.40
  6. Step 6: Final answer
    x = 65,215.05

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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.