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Finding the Fourth Proportional to 325,113.66, 487,549.50 and 111,821.70

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Solution

The fourth proportional to 325,113.66, 487,549.50 and 111,821.70 is: 167,690.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,113.66 : 487,549.50 = 111,821.70 : x
  2. Step 2: Convert to fraction form
    325,113.66/487,549.50 = 111,821.70/x
  3. Step 3: Cross multiply
    325,113.66x = 487,549.50 × 111,821.70
  4. Step 4: Simplify right side
    325,113.66x = 54,518,613,924.15
  5. Step 5: Solve for x
    x = 54,518,613,924.15/325,113.66
  6. Step 6: Final answer
    x = 167,690.94

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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.