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Finding the Fourth Proportional to 56,155.88, 84,211.68 and 21,076.40

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Solution

The fourth proportional to 56,155.88, 84,211.68 and 21,076.40 is: 31,606.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,155.88 : 84,211.68 = 21,076.40 : x
  2. Step 2: Convert to fraction form
    56,155.88/84,211.68 = 21,076.40/x
  3. Step 3: Cross multiply
    56,155.88x = 84,211.68 × 21,076.40
  4. Step 4: Simplify right side
    56,155.88x = 1,774,879,052.35
  5. Step 5: Solve for x
    x = 1,774,879,052.35/56,155.88
  6. Step 6: Final answer
    x = 31,606.29

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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.