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Finding the Fourth Proportional to 85,107.40, 127,358.70 and 74,134.60

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Solution

The fourth proportional to 85,107.40, 127,358.70 and 74,134.60 is: 110,938.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,107.40 : 127,358.70 = 74,134.60 : x
  2. Step 2: Convert to fraction form
    85,107.40/127,358.70 = 74,134.60/x
  3. Step 3: Cross multiply
    85,107.40x = 127,358.70 × 74,134.60
  4. Step 4: Simplify right side
    85,107.40x = 9,441,686,281.02
  5. Step 5: Solve for x
    x = 9,441,686,281.02/85,107.40
  6. Step 6: Final answer
    x = 110,938.49

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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.