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Finding the Fourth Proportional to 134,689.20, 201,985.20 and 54,693.60

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Solution

The fourth proportional to 134,689.20, 201,985.20 and 54,693.60 is: 82,020.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,689.20 : 201,985.20 = 54,693.60 : x
  2. Step 2: Convert to fraction form
    134,689.20/201,985.20 = 54,693.60/x
  3. Step 3: Cross multiply
    134,689.20x = 201,985.20 × 54,693.60
  4. Step 4: Simplify right side
    134,689.20x = 11,047,297,734.72
  5. Step 5: Solve for x
    x = 11,047,297,734.72/134,689.20
  6. Step 6: Final answer
    x = 82,020.66

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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.