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Finding the Fourth Proportional to 314,344.91, 471,512.76 and 77,687.61

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Solution

The fourth proportional to 314,344.91, 471,512.76 and 77,687.61 is: 116,530.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,344.91 : 471,512.76 = 77,687.61 : x
  2. Step 2: Convert to fraction form
    314,344.91/471,512.76 = 77,687.61/x
  3. Step 3: Cross multiply
    314,344.91x = 471,512.76 × 77,687.61
  4. Step 4: Simplify right side
    314,344.91x = 36,630,699,408.90
  5. Step 5: Solve for x
    x = 36,630,699,408.90/314,344.91
  6. Step 6: Final answer
    x = 116,530.28

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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.