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Finding the Fourth Proportional to 223,811.04, 308,900.64 and 128,318.40

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Solution

The fourth proportional to 223,811.04, 308,900.64 and 128,318.40 is: 177,103.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,811.04 : 308,900.64 = 128,318.40 : x
  2. Step 2: Convert to fraction form
    223,811.04/308,900.64 = 128,318.40/x
  3. Step 3: Cross multiply
    223,811.04x = 308,900.64 × 128,318.40
  4. Step 4: Simplify right side
    223,811.04x = 39,637,635,883.78
  5. Step 5: Solve for x
    x = 39,637,635,883.78/223,811.04
  6. Step 6: Final answer
    x = 177,103.13

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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.