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Finding the Fourth Proportional to 101,915.91, 140,639.23 and 56,596.77

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Solution

The fourth proportional to 101,915.91, 140,639.23 and 56,596.77 is: 78,100.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,915.91 : 140,639.23 = 56,596.77 : x
  2. Step 2: Convert to fraction form
    101,915.91/140,639.23 = 56,596.77/x
  3. Step 3: Cross multiply
    101,915.91x = 140,639.23 × 56,596.77
  4. Step 4: Simplify right side
    101,915.91x = 7,959,726,011.80
  5. Step 5: Solve for x
    x = 7,959,726,011.80/101,915.91
  6. Step 6: Final answer
    x = 78,100.92

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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.