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Finding the Fourth Proportional to 316,502.55, 474,679.31 and 91,803.69

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Solution

The fourth proportional to 316,502.55, 474,679.31 and 91,803.69 is: 137,683.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,502.55 : 474,679.31 = 91,803.69 : x
  2. Step 2: Convert to fraction form
    316,502.55/474,679.31 = 91,803.69/x
  3. Step 3: Cross multiply
    316,502.55x = 474,679.31 × 91,803.69
  4. Step 4: Simplify right side
    316,502.55x = 43,577,311,765.64
  5. Step 5: Solve for x
    x = 43,577,311,765.64/316,502.55
  6. Step 6: Final answer
    x = 137,683.92

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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.