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Finding the Fourth Proportional to 56,070.82, 84,106.23 and 21,005.92

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Solution

The fourth proportional to 56,070.82, 84,106.23 and 21,005.92 is: 31,508.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,070.82 : 84,106.23 = 21,005.92 : x
  2. Step 2: Convert to fraction form
    56,070.82/84,106.23 = 21,005.92/x
  3. Step 3: Cross multiply
    56,070.82x = 84,106.23 × 21,005.92
  4. Step 4: Simplify right side
    56,070.82x = 1,766,728,738.88
  5. Step 5: Solve for x
    x = 1,766,728,738.88/56,070.82
  6. Step 6: Final answer
    x = 31,508.88

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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.