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Finding the Fourth Proportional to 44,985, 67,431.42 and 18,705

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Solution

The fourth proportional to 44,985, 67,431.42 and 18,705 is: 28,038.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,985 : 67,431.42 = 18,705 : x
  2. Step 2: Convert to fraction form
    44,985/67,431.42 = 18,705/x
  3. Step 3: Cross multiply
    44,985x = 67,431.42 × 18,705
  4. Step 4: Simplify right side
    44,985x = 1,261,304,711.10
  5. Step 5: Solve for x
    x = 1,261,304,711.10/44,985
  6. Step 6: Final answer
    x = 28,038.34

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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.