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Finding the Fourth Proportional to 99,135.28, 136,803 and 56,692.72

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Solution

The fourth proportional to 99,135.28, 136,803 and 56,692.72 is: 78,233.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,135.28 : 136,803 = 56,692.72 : x
  2. Step 2: Convert to fraction form
    99,135.28/136,803 = 56,692.72/x
  3. Step 3: Cross multiply
    99,135.28x = 136,803 × 56,692.72
  4. Step 4: Simplify right side
    99,135.28x = 7,755,734,174.16
  5. Step 5: Solve for x
    x = 7,755,734,174.16/99,135.28
  6. Step 6: Final answer
    x = 78,233.85

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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.