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Finding the Fourth Proportional to 231,605.40, 347,408.10 and 91,345.80

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Solution

The fourth proportional to 231,605.40, 347,408.10 and 91,345.80 is: 137,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,605.40 : 347,408.10 = 91,345.80 : x
  2. Step 2: Convert to fraction form
    231,605.40/347,408.10 = 91,345.80/x
  3. Step 3: Cross multiply
    231,605.40x = 347,408.10 × 91,345.80
  4. Step 4: Simplify right side
    231,605.40x = 31,734,270,820.98
  5. Step 5: Solve for x
    x = 31,734,270,820.98/231,605.40
  6. Step 6: Final answer
    x = 137,018.70

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1.5x scale

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.