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Finding the Fourth Proportional to 55,874.84, 77,107.20 and 30,724.40

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Solution

The fourth proportional to 55,874.84, 77,107.20 and 30,724.40 is: 42,399.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,874.84 : 77,107.20 = 30,724.40 : x
  2. Step 2: Convert to fraction form
    55,874.84/77,107.20 = 30,724.40/x
  3. Step 3: Cross multiply
    55,874.84x = 77,107.20 × 30,724.40
  4. Step 4: Simplify right side
    55,874.84x = 2,369,072,455.68
  5. Step 5: Solve for x
    x = 2,369,072,455.68/55,874.84
  6. Step 6: Final answer
    x = 42,399.63

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1.5x scale

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.