Home / 81,165.40-121,748.10-74,944.60

Finding the Fourth Proportional to 81,165.40, 121,748.10 and 74,944.60

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Solution

The fourth proportional to 81,165.40, 121,748.10 and 74,944.60 is: 112,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,165.40 : 121,748.10 = 74,944.60 : x
  2. Step 2: Convert to fraction form
    81,165.40/121,748.10 = 74,944.60/x
  3. Step 3: Cross multiply
    81,165.40x = 121,748.10 × 74,944.60
  4. Step 4: Simplify right side
    81,165.40x = 9,124,362,655.26
  5. Step 5: Solve for x
    x = 9,124,362,655.26/81,165.40
  6. Step 6: Final answer
    x = 112,416.90

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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.