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Finding the Fourth Proportional to 99,075, 136,730.70 and 56,632.44

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Solution

The fourth proportional to 99,075, 136,730.70 and 56,632.44 is: 78,156.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,075 : 136,730.70 = 56,632.44 : x
  2. Step 2: Convert to fraction form
    99,075/136,730.70 = 56,632.44/x
  3. Step 3: Cross multiply
    99,075x = 136,730.70 × 56,632.44
  4. Step 4: Simplify right side
    99,075x = 7,743,393,163.91
  5. Step 5: Solve for x
    x = 7,743,393,163.91/99,075
  6. Step 6: Final answer
    x = 78,156.88

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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.