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Finding the Fourth Proportional to 55,788.87, 76,990.22 and 30,639.99

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Solution

The fourth proportional to 55,788.87, 76,990.22 and 30,639.99 is: 42,284.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,788.87 : 76,990.22 = 30,639.99 : x
  2. Step 2: Convert to fraction form
    55,788.87/76,990.22 = 30,639.99/x
  3. Step 3: Cross multiply
    55,788.87x = 76,990.22 × 30,639.99
  4. Step 4: Simplify right side
    55,788.87x = 2,358,979,417.70
  5. Step 5: Solve for x
    x = 2,358,979,417.70/55,788.87
  6. Step 6: Final answer
    x = 42,284.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.