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Finding the Fourth Proportional to 223,581.78, 308,542.64 and 128,088.86

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Solution

The fourth proportional to 223,581.78, 308,542.64 and 128,088.86 is: 176,762.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,581.78 : 308,542.64 = 128,088.86 : x
  2. Step 2: Convert to fraction form
    223,581.78/308,542.64 = 128,088.86/x
  3. Step 3: Cross multiply
    223,581.78x = 308,542.64 × 128,088.86
  4. Step 4: Simplify right side
    223,581.78x = 39,520,872,835.83
  5. Step 5: Solve for x
    x = 39,520,872,835.83/223,581.78
  6. Step 6: Final answer
    x = 176,762.49

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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.