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Finding the Fourth Proportional to 145,471.35, 218,207.13 and 45,639.39

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Solution

The fourth proportional to 145,471.35, 218,207.13 and 45,639.39 is: 68,459.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,471.35 : 218,207.13 = 45,639.39 : x
  2. Step 2: Convert to fraction form
    145,471.35/218,207.13 = 45,639.39/x
  3. Step 3: Cross multiply
    145,471.35x = 218,207.13 × 45,639.39
  4. Step 4: Simplify right side
    145,471.35x = 9,958,840,306.85
  5. Step 5: Solve for x
    x = 9,958,840,306.85/145,471.35
  6. Step 6: Final answer
    x = 68,459.12

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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.