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Finding the Fourth Proportional to 80,656.98, 120,748.89 and 56,557.73

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Solution

The fourth proportional to 80,656.98, 120,748.89 and 56,557.73 is: 84,670.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,656.98 : 120,748.89 = 56,557.73 : x
  2. Step 2: Convert to fraction form
    80,656.98/120,748.89 = 56,557.73/x
  3. Step 3: Cross multiply
    80,656.98x = 120,748.89 × 56,557.73
  4. Step 4: Simplify right side
    80,656.98x = 6,829,283,118.42
  5. Step 5: Solve for x
    x = 6,829,283,118.42/80,656.98
  6. Step 6: Final answer
    x = 84,670.70

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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.