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Finding the Fourth Proportional to 99,345.80, 149,045.10 and 43,161.80

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Solution

The fourth proportional to 99,345.80, 149,045.10 and 43,161.80 is: 64,754.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,345.80 : 149,045.10 = 43,161.80 : x
  2. Step 2: Convert to fraction form
    99,345.80/149,045.10 = 43,161.80/x
  3. Step 3: Cross multiply
    99,345.80x = 149,045.10 × 43,161.80
  4. Step 4: Simplify right side
    99,345.80x = 6,433,054,797.18
  5. Step 5: Solve for x
    x = 6,433,054,797.18/99,345.80
  6. Step 6: Final answer
    x = 64,754.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.