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Finding the Fourth Proportional to 243,001.71, 335,342.57 and 135,571.78

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Solution

The fourth proportional to 243,001.71, 335,342.57 and 135,571.78 is: 187,089.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,001.71 : 335,342.57 = 135,571.78 : x
  2. Step 2: Convert to fraction form
    243,001.71/335,342.57 = 135,571.78/x
  3. Step 3: Cross multiply
    243,001.71x = 335,342.57 × 135,571.78
  4. Step 4: Simplify right side
    243,001.71x = 45,462,989,124.67
  5. Step 5: Solve for x
    x = 45,462,989,124.67/243,001.71
  6. Step 6: Final answer
    x = 187,089.17

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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.