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Finding the Fourth Proportional to 243,345.76, 335,813.64 and 135,917.35

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Solution

The fourth proportional to 243,345.76, 335,813.64 and 135,917.35 is: 187,563.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,345.76 : 335,813.64 = 135,917.35 : x
  2. Step 2: Convert to fraction form
    243,345.76/335,813.64 = 135,917.35/x
  3. Step 3: Cross multiply
    243,345.76x = 335,813.64 × 135,917.35
  4. Step 4: Simplify right side
    243,345.76x = 45,642,900,042.65
  5. Step 5: Solve for x
    x = 45,642,900,042.65/243,345.76
  6. Step 6: Final answer
    x = 187,563.98

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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.