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Finding the Fourth Proportional to 85,877.20, 128,662.20 and 73,589.20

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Solution

The fourth proportional to 85,877.20, 128,662.20 and 73,589.20 is: 110,252.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,877.20 : 128,662.20 = 73,589.20 : x
  2. Step 2: Convert to fraction form
    85,877.20/128,662.20 = 73,589.20/x
  3. Step 3: Cross multiply
    85,877.20x = 128,662.20 × 73,589.20
  4. Step 4: Simplify right side
    85,877.20x = 9,468,148,368.24
  5. Step 5: Solve for x
    x = 9,468,148,368.24/85,877.20
  6. Step 6: Final answer
    x = 110,252.18

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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.