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Finding the Fourth Proportional to 316,315.56, 474,473.64 and 129,327.06

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Solution

The fourth proportional to 316,315.56, 474,473.64 and 129,327.06 is: 193,990.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,315.56 : 474,473.64 = 129,327.06 : x
  2. Step 2: Convert to fraction form
    316,315.56/474,473.64 = 129,327.06/x
  3. Step 3: Cross multiply
    316,315.56x = 474,473.64 × 129,327.06
  4. Step 4: Simplify right side
    316,315.56x = 61,362,280,908.70
  5. Step 5: Solve for x
    x = 61,362,280,908.70/316,315.56
  6. Step 6: Final answer
    x = 193,990.71

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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.