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Finding the Fourth Proportional to 85,200.40, 127,704.60 and 40,848.40

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Solution

The fourth proportional to 85,200.40, 127,704.60 and 40,848.40 is: 61,226.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,200.40 : 127,704.60 = 40,848.40 : x
  2. Step 2: Convert to fraction form
    85,200.40/127,704.60 = 40,848.40/x
  3. Step 3: Cross multiply
    85,200.40x = 127,704.60 × 40,848.40
  4. Step 4: Simplify right side
    85,200.40x = 5,216,528,582.64
  5. Step 5: Solve for x
    x = 5,216,528,582.64/85,200.40
  6. Step 6: Final answer
    x = 61,226.57

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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.