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Finding the Fourth Proportional to 223,583.78, 308,545.39 and 128,090.86

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Solution

The fourth proportional to 223,583.78, 308,545.39 and 128,090.86 is: 176,765.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,583.78 : 308,545.39 = 128,090.86 : x
  2. Step 2: Convert to fraction form
    223,583.78/308,545.39 = 128,090.86/x
  3. Step 3: Cross multiply
    223,583.78x = 308,545.39 × 128,090.86
  4. Step 4: Simplify right side
    223,583.78x = 39,521,844,354.14
  5. Step 5: Solve for x
    x = 39,521,844,354.14/223,583.78
  6. Step 6: Final answer
    x = 176,765.26

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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.