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Finding the Fourth Proportional to 71,729.69, 107,482.05 and 45,378.77

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Solution

The fourth proportional to 71,729.69, 107,482.05 and 45,378.77 is: 67,996.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,729.69 : 107,482.05 = 45,378.77 : x
  2. Step 2: Convert to fraction form
    71,729.69/107,482.05 = 45,378.77/x
  3. Step 3: Cross multiply
    71,729.69x = 107,482.05 × 45,378.77
  4. Step 4: Simplify right side
    71,729.69x = 4,877,402,688.67
  5. Step 5: Solve for x
    x = 4,877,402,688.67/71,729.69
  6. Step 6: Final answer
    x = 67,996.99

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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.