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Finding the Fourth Proportional to 99,108, 136,769.76 and 56,087.60

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Solution

The fourth proportional to 99,108, 136,769.76 and 56,087.60 is: 77,401.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,108 : 136,769.76 = 56,087.60 : x
  2. Step 2: Convert to fraction form
    99,108/136,769.76 = 56,087.60/x
  3. Step 3: Cross multiply
    99,108x = 136,769.76 × 56,087.60
  4. Step 4: Simplify right side
    99,108x = 7,671,086,907.13
  5. Step 5: Solve for x
    x = 7,671,086,907.13/99,108
  6. Step 6: Final answer
    x = 77,401.29

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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.