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Finding the Fourth Proportional to 71,730.69, 107,483.55 and 45,379.77

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Solution

The fourth proportional to 71,730.69, 107,483.55 and 45,379.77 is: 67,998.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,730.69 : 107,483.55 = 45,379.77 : x
  2. Step 2: Convert to fraction form
    71,730.69/107,483.55 = 45,379.77/x
  3. Step 3: Cross multiply
    71,730.69x = 107,483.55 × 45,379.77
  4. Step 4: Simplify right side
    71,730.69x = 4,877,578,777.78
  5. Step 5: Solve for x
    x = 4,877,578,777.78/71,730.69
  6. Step 6: Final answer
    x = 67,998.49

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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.