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Finding the Fourth Proportional to 101,912.91, 140,656.45 and 56,605.48

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Solution

The fourth proportional to 101,912.91, 140,656.45 and 56,605.48 is: 78,124.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,912.91 : 140,656.45 = 56,605.48 : x
  2. Step 2: Convert to fraction form
    101,912.91/140,656.45 = 56,605.48/x
  3. Step 3: Cross multiply
    101,912.91x = 140,656.45 × 56,605.48
  4. Step 4: Simplify right side
    101,912.91x = 7,961,926,271.52
  5. Step 5: Solve for x
    x = 7,961,926,271.52/101,912.91
  6. Step 6: Final answer
    x = 78,124.81

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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.