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Finding the Fourth Proportional to 212,361.17, 318,541.43 and 145,598.90

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Solution

The fourth proportional to 212,361.17, 318,541.43 and 145,598.90 is: 218,398.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,361.17 : 318,541.43 = 145,598.90 : x
  2. Step 2: Convert to fraction form
    212,361.17/318,541.43 = 145,598.90/x
  3. Step 3: Cross multiply
    212,361.17x = 318,541.43 × 145,598.90
  4. Step 4: Simplify right side
    212,361.17x = 46,379,282,972.78
  5. Step 5: Solve for x
    x = 46,379,282,972.78/212,361.17
  6. Step 6: Final answer
    x = 218,398.13

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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.