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Finding the Fourth Proportional to 316,552.65, 474,853.58 and 91,916.78

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Solution

The fourth proportional to 316,552.65, 474,853.58 and 91,916.78 is: 137,882.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,552.65 : 474,853.58 = 91,916.78 : x
  2. Step 2: Convert to fraction form
    316,552.65/474,853.58 = 91,916.78/x
  3. Step 3: Cross multiply
    316,552.65x = 474,853.58 × 91,916.78
  4. Step 4: Simplify right side
    316,552.65x = 43,647,009,900.60
  5. Step 5: Solve for x
    x = 43,647,009,900.60/316,552.65
  6. Step 6: Final answer
    x = 137,882.31

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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.