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Finding the Fourth Proportional to 63,690.54, 87,893.46 and 39,831.06

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Solution

The fourth proportional to 63,690.54, 87,893.46 and 39,831.06 is: 54,967.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,690.54 : 87,893.46 = 39,831.06 : x
  2. Step 2: Convert to fraction form
    63,690.54/87,893.46 = 39,831.06/x
  3. Step 3: Cross multiply
    63,690.54x = 87,893.46 × 39,831.06
  4. Step 4: Simplify right side
    63,690.54x = 3,500,889,678.87
  5. Step 5: Solve for x
    x = 3,500,889,678.87/63,690.54
  6. Step 6: Final answer
    x = 54,967.18

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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.