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Finding the Fourth Proportional to 316,309.50, 474,488.58 and 91,672.98

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Solution

The fourth proportional to 316,309.50, 474,488.58 and 91,672.98 is: 137,516.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,309.50 : 474,488.58 = 91,672.98 : x
  2. Step 2: Convert to fraction form
    316,309.50/474,488.58 = 91,672.98/x
  3. Step 3: Cross multiply
    316,309.50x = 474,488.58 × 91,672.98
  4. Step 4: Simplify right side
    316,309.50x = 43,497,782,104.57
  5. Step 5: Solve for x
    x = 43,497,782,104.57/316,309.50
  6. Step 6: Final answer
    x = 137,516.52

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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.