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Finding the Fourth Proportional to 101,779.17, 140,472.06 and 56,471.73

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Solution

The fourth proportional to 101,779.17, 140,472.06 and 56,471.73 is: 77,940.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,779.17 : 140,472.06 = 56,471.73 : x
  2. Step 2: Convert to fraction form
    101,779.17/140,472.06 = 56,471.73/x
  3. Step 3: Cross multiply
    101,779.17x = 140,472.06 × 56,471.73
  4. Step 4: Simplify right side
    101,779.17x = 7,932,700,244.86
  5. Step 5: Solve for x
    x = 7,932,700,244.86/101,779.17
  6. Step 6: Final answer
    x = 77,940.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.