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Finding the Fourth Proportional to 145,344.40, 218,081.40 and 51,917.20

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Solution

The fourth proportional to 145,344.40, 218,081.40 and 51,917.20 is: 77,898.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,344.40 : 218,081.40 = 51,917.20 : x
  2. Step 2: Convert to fraction form
    145,344.40/218,081.40 = 51,917.20/x
  3. Step 3: Cross multiply
    145,344.40x = 218,081.40 × 51,917.20
  4. Step 4: Simplify right side
    145,344.40x = 11,322,175,660.08
  5. Step 5: Solve for x
    x = 11,322,175,660.08/145,344.40
  6. Step 6: Final answer
    x = 77,898.95

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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.