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Finding the Fourth Proportional to 205,864.40, 308,825.40 and 87,534.80

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Solution

The fourth proportional to 205,864.40, 308,825.40 and 87,534.80 is: 131,314.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,864.40 : 308,825.40 = 87,534.80 : x
  2. Step 2: Convert to fraction form
    205,864.40/308,825.40 = 87,534.80/x
  3. Step 3: Cross multiply
    205,864.40x = 308,825.40 × 87,534.80
  4. Step 4: Simplify right side
    205,864.40x = 27,032,969,623.92
  5. Step 5: Solve for x
    x = 27,032,969,623.92/205,864.40
  6. Step 6: Final answer
    x = 131,314.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.