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Finding the Fourth Proportional to 77,479.28, 116,203.80 and 21,304.98

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Solution

The fourth proportional to 77,479.28, 116,203.80 and 21,304.98 is: 31,953.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,479.28 : 116,203.80 = 21,304.98 : x
  2. Step 2: Convert to fraction form
    77,479.28/116,203.80 = 21,304.98/x
  3. Step 3: Cross multiply
    77,479.28x = 116,203.80 × 21,304.98
  4. Step 4: Simplify right side
    77,479.28x = 2,475,719,634.92
  5. Step 5: Solve for x
    x = 2,475,719,634.92/77,479.28
  6. Step 6: Final answer
    x = 31,953.31

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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.