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Finding the Fourth Proportional to 99,222.66, 136,929.69 and 56,794.86

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Solution

The fourth proportional to 99,222.66, 136,929.69 and 56,794.86 is: 78,378.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,222.66 : 136,929.69 = 56,794.86 : x
  2. Step 2: Convert to fraction form
    99,222.66/136,929.69 = 56,794.86/x
  3. Step 3: Cross multiply
    99,222.66x = 136,929.69 × 56,794.86
  4. Step 4: Simplify right side
    99,222.66x = 7,776,902,573.39
  5. Step 5: Solve for x
    x = 7,776,902,573.39/99,222.66
  6. Step 6: Final answer
    x = 78,378.29

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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.