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Finding the Fourth Proportional to 86,108.88, 129,164.60 and 56,714.96

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Solution

The fourth proportional to 86,108.88, 129,164.60 and 56,714.96 is: 85,073.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,108.88 : 129,164.60 = 56,714.96 : x
  2. Step 2: Convert to fraction form
    86,108.88/129,164.60 = 56,714.96/x
  3. Step 3: Cross multiply
    86,108.88x = 129,164.60 × 56,714.96
  4. Step 4: Simplify right side
    86,108.88x = 7,325,565,122.42
  5. Step 5: Solve for x
    x = 7,325,565,122.42/86,108.88
  6. Step 6: Final answer
    x = 85,073.28

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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.