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Finding the Fourth Proportional to 49,643.40, 74,478.30 and 21,551.40

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Solution

The fourth proportional to 49,643.40, 74,478.30 and 21,551.40 is: 32,332.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,643.40 : 74,478.30 = 21,551.40 : x
  2. Step 2: Convert to fraction form
    49,643.40/74,478.30 = 21,551.40/x
  3. Step 3: Cross multiply
    49,643.40x = 74,478.30 × 21,551.40
  4. Step 4: Simplify right side
    49,643.40x = 1,605,111,634.62
  5. Step 5: Solve for x
    x = 1,605,111,634.62/49,643.40
  6. Step 6: Final answer
    x = 32,332.83

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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.