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Finding the Fourth Proportional to 212,517.61, 318,776.11 and 145,755.34

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Solution

The fourth proportional to 212,517.61, 318,776.11 and 145,755.34 is: 218,632.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,517.61 : 318,776.11 = 145,755.34 : x
  2. Step 2: Convert to fraction form
    212,517.61/318,776.11 = 145,755.34/x
  3. Step 3: Cross multiply
    212,517.61x = 318,776.11 × 145,755.34
  4. Step 4: Simplify right side
    212,517.61x = 46,463,319,135.60
  5. Step 5: Solve for x
    x = 46,463,319,135.60/212,517.61
  6. Step 6: Final answer
    x = 218,632.80

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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.