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Finding the Fourth Proportional to 315,086.76, 434,814.48 and 171,838.26

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Solution

The fourth proportional to 315,086.76, 434,814.48 and 171,838.26 is: 237,133.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,086.76 : 434,814.48 = 171,838.26 : x
  2. Step 2: Convert to fraction form
    315,086.76/434,814.48 = 171,838.26/x
  3. Step 3: Cross multiply
    315,086.76x = 434,814.48 × 171,838.26
  4. Step 4: Simplify right side
    315,086.76x = 74,717,763,666.00
  5. Step 5: Solve for x
    x = 74,717,763,666.00/315,086.76
  6. Step 6: Final answer
    x = 237,133.94

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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.