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Finding the Fourth Proportional to 56,240.76, 84,366.90 and 21,209.88

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Solution

The fourth proportional to 56,240.76, 84,366.90 and 21,209.88 is: 31,816.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,240.76 : 84,366.90 = 21,209.88 : x
  2. Step 2: Convert to fraction form
    56,240.76/84,366.90 = 21,209.88/x
  3. Step 3: Cross multiply
    56,240.76x = 84,366.90 × 21,209.88
  4. Step 4: Simplify right side
    56,240.76x = 1,789,411,824.97
  5. Step 5: Solve for x
    x = 1,789,411,824.97/56,240.76
  6. Step 6: Final answer
    x = 31,816.99

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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.