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Finding the Fourth Proportional to 71,655.58, 107,483.37 and 42,278.86

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Solution

The fourth proportional to 71,655.58, 107,483.37 and 42,278.86 is: 63,418.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,655.58 : 107,483.37 = 42,278.86 : x
  2. Step 2: Convert to fraction form
    71,655.58/107,483.37 = 42,278.86/x
  3. Step 3: Cross multiply
    71,655.58x = 107,483.37 × 42,278.86
  4. Step 4: Simplify right side
    71,655.58x = 4,544,274,352.56
  5. Step 5: Solve for x
    x = 4,544,274,352.56/71,655.58
  6. Step 6: Final answer
    x = 63,418.29

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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.