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Finding the Fourth Proportional to 316,967.67, 475,506.86 and 139,470.08

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Solution

The fourth proportional to 316,967.67, 475,506.86 and 139,470.08 is: 209,229.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,967.67 : 475,506.86 = 139,470.08 : x
  2. Step 2: Convert to fraction form
    316,967.67/475,506.86 = 139,470.08/x
  3. Step 3: Cross multiply
    316,967.67x = 475,506.86 × 139,470.08
  4. Step 4: Simplify right side
    316,967.67x = 66,318,976,729.86
  5. Step 5: Solve for x
    x = 66,318,976,729.86/316,967.67
  6. Step 6: Final answer
    x = 209,229.47

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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.