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Finding the Fourth Proportional to 72,090.35, 108,135.51 and 52,493.62

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Solution

The fourth proportional to 72,090.35, 108,135.51 and 52,493.62 is: 78,740.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,090.35 : 108,135.51 = 52,493.62 : x
  2. Step 2: Convert to fraction form
    72,090.35/108,135.51 = 52,493.62/x
  3. Step 3: Cross multiply
    72,090.35x = 108,135.51 × 52,493.62
  4. Step 4: Simplify right side
    72,090.35x = 5,676,423,829.77
  5. Step 5: Solve for x
    x = 5,676,423,829.77/72,090.35
  6. Step 6: Final answer
    x = 78,740.41

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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.