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Finding the Fourth Proportional to 212,280.55, 318,424.06 and 54,505.51

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Solution

The fourth proportional to 212,280.55, 318,424.06 and 54,505.51 is: 81,759.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,280.55 : 318,424.06 = 54,505.51 : x
  2. Step 2: Convert to fraction form
    212,280.55/318,424.06 = 54,505.51/x
  3. Step 3: Cross multiply
    212,280.55x = 318,424.06 × 54,505.51
  4. Step 4: Simplify right side
    212,280.55x = 17,355,865,058.64
  5. Step 5: Solve for x
    x = 17,355,865,058.64/212,280.55
  6. Step 6: Final answer
    x = 81,759.09

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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.