Home / 81,154.40-121,731.60-74,933.60

Finding the Fourth Proportional to 81,154.40, 121,731.60 and 74,933.60

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Solution

The fourth proportional to 81,154.40, 121,731.60 and 74,933.60 is: 112,400.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,154.40 : 121,731.60 = 74,933.60 : x
  2. Step 2: Convert to fraction form
    81,154.40/121,731.60 = 74,933.60/x
  3. Step 3: Cross multiply
    81,154.40x = 121,731.60 × 74,933.60
  4. Step 4: Simplify right side
    81,154.40x = 9,121,787,021.76
  5. Step 5: Solve for x
    x = 9,121,787,021.76/81,154.40
  6. Step 6: Final answer
    x = 112,400.40

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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.