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Finding the Fourth Proportional to 99,066.62, 136,764.97 and 76,355.84

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Solution

The fourth proportional to 99,066.62, 136,764.97 and 76,355.84 is: 105,411.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,066.62 : 136,764.97 = 76,355.84 : x
  2. Step 2: Convert to fraction form
    99,066.62/136,764.97 = 76,355.84/x
  3. Step 3: Cross multiply
    99,066.62x = 136,764.97 × 76,355.84
  4. Step 4: Simplify right side
    99,066.62x = 10,442,803,292.21
  5. Step 5: Solve for x
    x = 10,442,803,292.21/99,066.62
  6. Step 6: Final answer
    x = 105,411.93

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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.