Home / 74,140.40-111,218.70-71,807.60

Finding the Fourth Proportional to 74,140.40, 111,218.70 and 71,807.60

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Solution

The fourth proportional to 74,140.40, 111,218.70 and 71,807.60 is: 107,719.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,140.40 : 111,218.70 = 71,807.60 : x
  2. Step 2: Convert to fraction form
    74,140.40/111,218.70 = 71,807.60/x
  3. Step 3: Cross multiply
    74,140.40x = 111,218.70 × 71,807.60
  4. Step 4: Simplify right side
    74,140.40x = 7,986,347,922.12
  5. Step 5: Solve for x
    x = 7,986,347,922.12/74,140.40
  6. Step 6: Final answer
    x = 107,719.25

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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.