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Finding the Fourth Proportional to 56,703, 85,068.90 and 19,769.88

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Solution

The fourth proportional to 56,703, 85,068.90 and 19,769.88 is: 29,659.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,703 : 85,068.90 = 19,769.88 : x
  2. Step 2: Convert to fraction form
    56,703/85,068.90 = 19,769.88/x
  3. Step 3: Cross multiply
    56,703x = 85,068.90 × 19,769.88
  4. Step 4: Simplify right side
    56,703x = 1,681,801,944.73
  5. Step 5: Solve for x
    x = 1,681,801,944.73/56,703
  6. Step 6: Final answer
    x = 29,659.84

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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.