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Finding the Fourth Proportional to 99,080, 136,737.60 and 56,637.44

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Solution

The fourth proportional to 99,080, 136,737.60 and 56,637.44 is: 78,163.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,080 : 136,737.60 = 56,637.44 : x
  2. Step 2: Convert to fraction form
    99,080/136,737.60 = 56,637.44/x
  3. Step 3: Cross multiply
    99,080x = 136,737.60 × 56,637.44
  4. Step 4: Simplify right side
    99,080x = 7,744,467,615.74
  5. Step 5: Solve for x
    x = 7,744,467,615.74/99,080
  6. Step 6: Final answer
    x = 78,163.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.