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Finding the Fourth Proportional to 306,218.56, 459,350.88 and 81,578.08

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Solution

The fourth proportional to 306,218.56, 459,350.88 and 81,578.08 is: 122,373.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,218.56 : 459,350.88 = 81,578.08 : x
  2. Step 2: Convert to fraction form
    306,218.56/459,350.88 = 81,578.08/x
  3. Step 3: Cross multiply
    306,218.56x = 459,350.88 × 81,578.08
  4. Step 4: Simplify right side
    306,218.56x = 37,472,962,836.71
  5. Step 5: Solve for x
    x = 37,472,962,836.71/306,218.56
  6. Step 6: Final answer
    x = 122,373.26

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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.