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Finding the Fourth Proportional to 101,679.85, 140,326.59 and 56,372.05

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Solution

The fourth proportional to 101,679.85, 140,326.59 and 56,372.05 is: 77,798.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,679.85 : 140,326.59 = 56,372.05 : x
  2. Step 2: Convert to fraction form
    101,679.85/140,326.59 = 56,372.05/x
  3. Step 3: Cross multiply
    101,679.85x = 140,326.59 × 56,372.05
  4. Step 4: Simplify right side
    101,679.85x = 7,910,496,846.18
  5. Step 5: Solve for x
    x = 7,910,496,846.18/101,679.85
  6. Step 6: Final answer
    x = 77,798.08

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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.