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Finding the Fourth Proportional to 99,080.45, 136,731.03 and 56,639.90

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Solution

The fourth proportional to 99,080.45, 136,731.03 and 56,639.90 is: 78,163.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,080.45 : 136,731.03 = 56,639.90 : x
  2. Step 2: Convert to fraction form
    99,080.45/136,731.03 = 56,639.90/x
  3. Step 3: Cross multiply
    99,080.45x = 136,731.03 × 56,639.90
  4. Step 4: Simplify right side
    99,080.45x = 7,744,431,866.10
  5. Step 5: Solve for x
    x = 7,744,431,866.10/99,080.45
  6. Step 6: Final answer
    x = 78,163.07

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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.