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Finding the Fourth Proportional to 223,693.44, 308,709.72 and 128,216.04

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Solution

The fourth proportional to 223,693.44, 308,709.72 and 128,216.04 is: 176,945.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,693.44 : 308,709.72 = 128,216.04 : x
  2. Step 2: Convert to fraction form
    223,693.44/308,709.72 = 128,216.04/x
  3. Step 3: Cross multiply
    223,693.44x = 308,709.72 × 128,216.04
  4. Step 4: Simplify right side
    223,693.44x = 39,581,537,807.91
  5. Step 5: Solve for x
    x = 39,581,537,807.91/223,693.44
  6. Step 6: Final answer
    x = 176,945.46

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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.