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Finding the Fourth Proportional to 56,188.94, 84,295.96 and 21,128.90

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Solution

The fourth proportional to 56,188.94, 84,295.96 and 21,128.90 is: 31,698.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,188.94 : 84,295.96 = 21,128.90 : x
  2. Step 2: Convert to fraction form
    56,188.94/84,295.96 = 21,128.90/x
  3. Step 3: Cross multiply
    56,188.94x = 84,295.96 × 21,128.90
  4. Step 4: Simplify right side
    56,188.94x = 1,781,080,909.24
  5. Step 5: Solve for x
    x = 1,781,080,909.24/56,188.94
  6. Step 6: Final answer
    x = 31,698.07

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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.