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Finding the Fourth Proportional to 72,161.88, 107,970.54 and 42,595.80

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Solution

The fourth proportional to 72,161.88, 107,970.54 and 42,595.80 is: 63,732.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,161.88 : 107,970.54 = 42,595.80 : x
  2. Step 2: Convert to fraction form
    72,161.88/107,970.54 = 42,595.80/x
  3. Step 3: Cross multiply
    72,161.88x = 107,970.54 × 42,595.80
  4. Step 4: Simplify right side
    72,161.88x = 4,599,091,527.73
  5. Step 5: Solve for x
    x = 4,599,091,527.73/72,161.88
  6. Step 6: Final answer
    x = 63,732.98

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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.