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Finding the Fourth Proportional to 335,957.50, 503,946.06 and 86,639.50

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Solution

The fourth proportional to 335,957.50, 503,946.06 and 86,639.50 is: 129,961.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,957.50 : 503,946.06 = 86,639.50 : x
  2. Step 2: Convert to fraction form
    335,957.50/503,946.06 = 86,639.50/x
  3. Step 3: Cross multiply
    335,957.50x = 503,946.06 × 86,639.50
  4. Step 4: Simplify right side
    335,957.50x = 43,661,634,665.37
  5. Step 5: Solve for x
    x = 43,661,634,665.37/335,957.50
  6. Step 6: Final answer
    x = 129,961.78

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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.