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Finding the Fourth Proportional to 223,605.04, 308,530.20 and 128,141.68

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Solution

The fourth proportional to 223,605.04, 308,530.20 and 128,141.68 is: 176,809.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,605.04 : 308,530.20 = 128,141.68 : x
  2. Step 2: Convert to fraction form
    223,605.04/308,530.20 = 128,141.68/x
  3. Step 3: Cross multiply
    223,605.04x = 308,530.20 × 128,141.68
  4. Step 4: Simplify right side
    223,605.04x = 39,535,578,158.74
  5. Step 5: Solve for x
    x = 39,535,578,158.74/223,605.04
  6. Step 6: Final answer
    x = 176,809.87

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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.