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Finding the Fourth Proportional to 56,390.60, 84,496.91 and 20,802.95

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Solution

The fourth proportional to 56,390.60, 84,496.91 and 20,802.95 is: 31,171.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,390.60 : 84,496.91 = 20,802.95 : x
  2. Step 2: Convert to fraction form
    56,390.60/84,496.91 = 20,802.95/x
  3. Step 3: Cross multiply
    56,390.60x = 84,496.91 × 20,802.95
  4. Step 4: Simplify right side
    56,390.60x = 1,757,784,467.39
  5. Step 5: Solve for x
    x = 1,757,784,467.39/56,390.60
  6. Step 6: Final answer
    x = 31,171.59

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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.